NEET-2024-R6 — NEET 2024 Question Paper with Solutions

Q1 PHYSICS Unit 14: Electromagnetic Induction and Alternating Currents

In an ideal transformer, the turns ratio is $\frac{N_P}{N_S} = \frac{1}{2}$. The ratio $V_S : V_P$ is equal to (the symbols carry their usual meaning) :

↻ Repeated question — also appeared in 2024 (5 sets)

A. 2 : 1
B. 1 : 1
C. 1 : 4
D. 1 : 2

Correct answer & explanation hidden

Log in to view solution →

Q1 PHYSICS Unit 14: Electromagnetic Induction and Alternating Currents

In an ideal transformer, the turns ratio is $\frac{N_P}{N_S} = \frac{1}{2}$. The ratio $V_S : V_P$ is equal to (the symbols carry their usual meaning):

↻ Repeated question — also appeared in 2024 (5 sets)

A. 2:1
B. 1:1
C. 1:4
D. 1:2

Correct answer & explanation hidden

Log in to view solution →

Q2 PHYSICS Unit 13: Magnetic Effects of Current and Magnetism

A tightly wound 100 turns coil of radius 10 cm carries a current of 7 A. The magnitude of the magnetic field at the centre of the coil is (Take permeability of free space as $4\pi \times 10^{-7}$ SI units):

↻ Repeated question — also appeared in 2024 (5 sets)

A. 4.4 T
B. 4.4 mT
C. 44 T
D. 44 mT

Correct answer & explanation hidden

Log in to view solution →

Q2 PHYSICS Unit 13: Magnetic Effects of Current and Magnetism

A tightly wound 100 turns coil of radius 10 cm carries a current of 7 A. The magnitude of the magnetic field at the centre of the coil is (Take permeability of free space as $4\pi \times 10^{-7}$ SI units):

↻ Repeated question — also appeared in 2024 (5 sets)

A. 4.4 T
B. 4.4 mT
C. 44 T
D. 44 mT

Correct answer & explanation hidden

Log in to view solution →

Q3 PHYSICS Unit 13: Magnetic Effects of Current and Magnetism

In a uniform magnetic field of 0.049 T, a magnetic needle performs 20 complete oscillations in 5 seconds as shown. The moment of inertia of the needle is $9.8 \times 10^{-6}\,kg\,m^2$. If the magnitude of magnetic moment of the needle is $x \times 10^{-5}\,Am^2$, then the value of 'x' is :

↻ Repeated question — also appeared in 2024 (3 sets)

A. 128 $\pi^2$
B. 50 $\pi^2$
C. 1280 $\pi^2$
D. 5 $\pi^2$

Correct answer & explanation hidden

Log in to view solution →

Q4 PHYSICS Unit 7: Properties of Solids and Liquids

A thin flat circular disc of radius 4.5 cm is placed gently over the surface of water. If surface tension of water is 0.07 $Nm^{-1}$, then the excess force required to take it away from the surface is :

↻ Repeated question — also appeared in 2024 (5 sets)

A. 198 N
B. 1.98 mN
C. 99 N
D. 19.8 mN

Correct answer & explanation hidden

Log in to view solution →

Q4 PHYSICS Unit 7: Properties of Solids and Liquids

A thin flat circular disc of radius 4.5 cm is placed gently over the surface of water. If surface tension of water is 0.07 Nm$^{-1}$, then the excess force required to take it away from the surface is:

↻ Repeated question — also appeared in 2024 (5 sets)

A. 198 N
B. 1.98 mN
C. 99 N
D. 19.8 mN

Correct answer & explanation hidden

Log in to view solution →

Q5 PHYSICS Unit 5: Rotational Motion

A wheel of a bullock cart is rolling on a level road as shown in the figure below. If its linear speed is v in the direction shown, which one of the following options is correct (P and Q are any highest and lowest points on the wheel, respectively)?

↻ Repeated question — also appeared in 2024 (4 sets)

A. Point P moves faster than point Q.
B. Both the points P and Q move with equal speed.
C. Point P has zero speed.
D. Point P moves slower than point Q.

Correct answer & explanation hidden

Log in to view solution →

Q5 PHYSICS Unit 5: Rotational Motion

A wheel of a bullock cart is rolling on a level road as shown in the figure below. If its linear speed is $v$ in the direction shown, which one of the following options is correct (P and Q are the highest and lowest points on the wheel, respectively)?

↻ Repeated question — also appeared in 2024 (4 sets)

A. Point P moves faster than point Q.
B. Both the points P and Q move with equal speed.
C. Point P has zero speed.
D. Point P moves slower than point Q.

Correct answer & explanation hidden

Log in to view solution →

Q6 PHYSICS Unit 10: Oscillations and Waves

If $x = 5 \sin(\pi t + \frac{\pi}{3})\,m$ represents the motion of a particle executing simple harmonic motion, the amplitude and time period of motion, respectively, are:

↻ Repeated question — also appeared in 2024 (4 sets)

A. 5 m, 2 s
B. 5 cm, 1 s
C. 5 m, 1 s
D. 5 cm, 2 s

Correct answer & explanation hidden

Log in to view solution →

Q8 PHYSICS Unit 12: Current Electricity

A wire of length 'l' and resistance $100\,\Omega$ is divided into 10 equal parts. The first 5 parts are connected in series while the next 5 parts are connected in parallel. The two combinations are again connected in series. The resistance of this final combination is:

↻ Repeated question — also appeared in 2024 (4 sets)

A. 52 $\Omega$
B. 55 $\Omega$
C. 60 $\Omega$
D. 26 $\Omega$

Correct answer & explanation hidden

Log in to view solution →

Q9 PHYSICS Unit 19: Electronic Devices

A logic circuit provides the output Y as per the following truth table: A | B | Y 0 | 0 | 1 0 | 1 | 0 1 | 0 | 1 1 | 1 | 0 The expression for the output Y is:

↻ Repeated question — also appeared in 2024 (1 set)

A. A.B + \bar{A}
B. \bar{B}
C. B
D. A.B + \bar{A}

Correct answer & explanation hidden

Log in to view solution →

Q10 PHYSICS Unit 1: Physics and Measurement

The quantities which have the same dimensions as those of solid angle are:

↻ Repeated question — also appeared in 2024 (3 sets)

A. stress and angle
B. strain and arc
C. angular speed and stress
D. strain and angle

Correct answer & explanation hidden

Log in to view solution →

Q11 PHYSICS Unit 11: Electrostatics

A thin spherical shell is charged by some source. The potential difference between the two points C and P (in V) shown in the figure is: (Take $\frac{1}{4\pi\epsilon_0} = 9 \times 10^9$ SI units)

↻ Repeated question — also appeared in 2024 (3 sets)

A. 1 $\times$ 10^5
B. 0.5 $\times$ 10^5
C. zero
D. 3 $\times$ 10^5

Correct answer & explanation hidden

Log in to view solution →

Q12 PHYSICS Unit 13: Magnetic Effects of Current and Magnetism

Match List-I with List-II.

↻ Repeated question — also appeared in 2024 (1 set)

A. A-II, B-I, C-III, D-IV
B. A-III, B-II, C-I, D-IV
C. A-IV, B-III, C-II, D-I
D. A-II, B-III, C-IV, D-I

Correct answer & explanation hidden

Log in to view solution →

Q13 PHYSICS Unit 18: Atoms and Nuclei

Match List I with List II. Spectral Lines of Hydrogen for transitions from:

A. A-III, B-IV, C-II, D-I
B. A-IV, B-III, C-I, D-II
C. A-I, B-II, C-III, D-IV
D. A-II, B-I, C-IV, D-III

Correct answer & explanation hidden

Log in to view solution →

Q14 PHYSICS Unit 18: Atoms and Nuclei

Given below are two statements: Statement I: Atoms are electrically neutral as they contain equal number of positive and negative charges. Statement II: Atoms of each element are stable and emit their characteristic spectrum. In the light of the above statements, choose the most appropriate answer from the options given below:

↻ Repeated question — also appeared in 2024 (4 sets)

A. Both Statement I and Statement II are incorrect.
B. Statement I is correct but Statement II is incorrect.
C. Statement I is incorrect but Statement II is correct.
D. Both Statement I and Statement II are correct.

Correct answer & explanation hidden

Log in to view solution →

Q15 PHYSICS Unit 16: Optics

An unpolarised light beam strikes a glass surface at Brewster's angle. Then

↻ Repeated question — also appeared in 2024 (4 sets)

A. the refracted light will be completely polarised.
B. both the reflected and refracted light will be completely polarised.
C. the reflected light will be completely polarised but the refracted light will be partially polarised.
D. the reflected light will be partially polarised.

Correct answer & explanation hidden

Log in to view solution →

Q16 PHYSICS Unit 17: Dual Nature of Matter and Radiation

The graph which shows the variation of $(1/\lambda^2)$ and its kinetic energy, E is (where $\lambda$ is de Broglie wavelength of a free particle):

↻ Repeated question — also appeared in 2024 (2 sets)

A. (1)
B. (2)
C. (3)
D. (4)

Correct answer & explanation hidden

Log in to view solution →

Q17 PHYSICS Unit 2: Kinematics

A particle moving with uniform speed in a circular path maintains:

↻ Repeated question — also appeared in 2024 (4 sets)

A. constant acceleration.
B. constant velocity but varying acceleration.
C. varying velocity and varying acceleration.
D. constant velocity.

Correct answer & explanation hidden

Log in to view solution →

Q18 PHYSICS Unit 17: Dual Nature of Matter and Radiation

If c is the velocity of light in free space, the correct statements about photon among the following are: A. The energy of a photon is $E = hv$. B. The velocity of a photon is c. C. The momentum of a photon, $p = \frac{hv}{c}$. D. In a photon-electron collision, both total energy and total momentum are conserved. E. Photon possesses positive charge. Choose the correct answer from the options given below:

↻ Repeated question — also appeared in 2024 (4 sets)

A. A, B, C and D only
B. A, C and D only
C. A, B, D and E only
D. A and B only

Correct answer & explanation hidden

Log in to view solution →

Q19 PHYSICS Unit 18: Atoms and Nuclei

In the nuclear emission stated above: $_{82}^{290}X \xrightarrow{\alpha} Y \xrightarrow{e^+} Z \xrightarrow{\beta^-} P \xrightarrow{e^-} Q$. The mass number and atomic number of the product Q respectively, are:

↻ Repeated question — also appeared in 2024 (3 sets)

A. 286, 80
B. 288, 82
C. 286, 81
D. 280, 81

Correct answer & explanation hidden

Log in to view solution →

Q20 PHYSICS Unit 12: Current Electricity

In the following circuit, the equivalent capacitance between terminal A and terminal B is:

A. 1 µF
B. 0.5 µF
C. 4 µF
D. 2 µF

Correct answer & explanation hidden

Log in to view solution →

Q21 PHYSICS Unit 12: Current Electricity

The terminal voltage of the battery, whose emf is $10 V$ and internal resistance $1 \Omega$, when connected through an external resistance of $4 \Omega$ as shown in the figure is:

↻ Repeated question — also appeared in 2024 (4 sets)

A. 6 V
B. 8 V
C. 10 V
D. 4 V

Correct answer & explanation hidden

Log in to view solution →

Q22 PHYSICS Unit 16: Optics

If the monochromatic source in Young's double slit experiment is replaced by white light, then:

↻ Repeated question — also appeared in 2024 (4 sets)

A. there will be a central dark fringe surrounded by a few coloured fringes.
B. there will be a central bright white fringe surrounded by a few coloured fringes.
C. all bright fringes will be of equal width.
D. interference pattern will disappear.

Correct answer & explanation hidden

Log in to view solution →

Q23 PHYSICS Unit 3: Laws of Motion

A horizontal force $10 N$ is applied to a block A as shown in figure. The mass of blocks A and B are $2 kg$ and $3 kg$, respectively. The blocks slide over a frictionless surface. The force exerted by block A on block B is:

↻ Repeated question — also appeared in 2024 (5 sets)

A. 4 N
B. 6 N
C. 10 N
D. zero

Correct answer & explanation hidden

Log in to view solution →

Q23 PHYSICS Unit 3: Laws of Motion

A horizontal force $10\text{ N}$ is applied to a block A as shown in figure. The mass of blocks A and B are $2\text{ kg}$ and $3\text{ kg}$, respectively. The blocks slide over a frictionless surface. The force exerted by block A on block B is:

↻ Repeated question — also appeared in 2024 (5 sets)

A. 4 N
B. 6 N
C. 10 N
D. zero

Correct answer & explanation hidden

Log in to view solution →

Q24 PHYSICS Unit 8: Thermodynamics

A thermodynamic system is taken through the cycle abcda. The work done by the gas along the path bc is:

↻ Repeated question — also appeared in 2024 (4 sets)

A. 30 J
B. -90 J
C. -60 J
D. zero

Correct answer & explanation hidden

Log in to view solution →

Q24 PHYSICS Unit 8: Thermodynamics

A thermodynamic system is taken through the cycle abeda. The work done by the gas along the path be is:

↻ Repeated question — also appeared in 2024 (4 sets)

A. 30 J
B. -90 J
C. -60 J
D. zero

Correct answer & explanation hidden

Log in to view solution →

Q25 PHYSICS Unit 7: Properties of Solids and Liquids

The maximum elongation of a steel wire of 1 m length if the elastic limit of steel and its Young's modulus, respectively, are $8 \times 10^8 N m^{-2}$ and $2 \times 10^{11} N m^{-2}$, is:

↻ Repeated question — also appeared in 2024 (5 sets)

A. 0.4 mm
B. 40 mm
C. 8 mm
D. 4 mm

Correct answer & explanation hidden

Log in to view solution →

Q25 PHYSICS Unit 7: Properties of Solids and Liquids

The maximum elongation of a steel wire of $1\text{ m}$ length if the elastic limit of steel and its Young's modulus, respectively, are $8 \times 10^8\text{ N m}^{-2}$ and $2 \times 10^{11}\text{ N m}^{-2}$, is:

↻ Repeated question — also appeared in 2024 (5 sets)

A. 0.4 mm
B. 40 mm
C. 8 mm
D. 4 mm

Correct answer & explanation hidden

Log in to view solution →

Q26 PHYSICS Unit 19: Electronic Devices

The output (Y) of the given logic gate is similar to the output of an/a:

↻ Repeated question — also appeared in 2024 (4 sets)

A. NOR gate
B. OR gate
C. AND gate
D. NAND gate

Correct answer & explanation hidden

Log in to view solution →

Q26 PHYSICS Unit 19: Electronic Devices

The output (Y) of the given logic gate is similar to the output of an/a:

↻ Repeated question — also appeared in 2024 (4 sets)

A. NOR gate
B. OR gate
C. AND gate
D. NAND gate

Correct answer & explanation hidden

Log in to view solution →

Q27 PHYSICS Unit 3: Laws of Motion

Two bodies A and B of same mass undergo completely inelastic one dimensional collision. The body A moves with velocity $v_1$ while body B is at rest before collision. The velocity of the system after collision is $v_2$. The ratio $v_1 : v_2$ is:

↻ Repeated question — also appeared in 2024 (4 sets)

A. 2:1
B. 4:1
C. 1:4
D. 1:2

Correct answer & explanation hidden

Log in to view solution →

Q28 PHYSICS Unit 19: Electronic Devices

Consider the following statements A and B and identify the correct answer: A. For a solar-cell, the I-V characteristics lies in the IV quadrant of the given graph. B. In a reverse biased pn junction diode, the current measured in ($\mu\text{A}$), is due to majority charge carriers.

↻ Repeated question — also appeared in 2024 (5 sets)

A. A is incorrect but B is correct.
B. Both A and B are correct.
C. Both A and B are incorrect.
D. A is correct but B is incorrect.

Correct answer & explanation hidden

Log in to view solution →

Q28 PHYSICS Unit 19: Electronic Devices

Consider the following statements A and B and identify the correct answer : - Statement A: For a solar-cell, the I-V characteristics lies in the IV quadrant of the given graph. - Statement B: In a reverse biased pn junction diode, the current measured in (μA), is due to majority charge carriers.

↻ Repeated question — also appeared in 2024 (5 sets)

A. A is incorrect but B is correct.
B. Both A and B are correct.
C. Both A and B are incorrect.
D. A is correct but B is incorrect.

Correct answer & explanation hidden

Log in to view solution →

Q29 PHYSICS Unit 14: Electromagnetic Induction and Alternating Currents

In the above diagram, a strong bar magnet is moving towards solenoid-2 from solenoid-1. The direction of induced current in solenoid-1 and that in solenoid-2, respectively, are through the directions:

↻ Repeated question — also appeared in 2024 (2 sets)

A. BA and CD
B. AB and CD
C. BA and DC
D. AB and DC

Correct answer & explanation hidden

Log in to view solution →

Q29 PHYSICS Unit 13: Magnetic Effects of Current and Magnetism

In the above diagram, a strong bar magnet is moving towards solenoid-2 from solenoid-1. The direction of induced current in solenoid-1 and that in solenoid-2, respectively, are through the directions:

↻ Repeated question — also appeared in 2024 (1 set)

A. BA and CD
B. AB and CD
C. BA and DC
D. AB and DC

Correct answer & explanation hidden

Log in to view solution →

Q30 PHYSICS Unit 11: Electrostatics

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: The potential (V) at any axial point, at $2\text{ m}$ distance (r) from the centre of the dipole of dipole moment vector $\vec{p}$ of magnitude $4 \times 10^{-6}\text{ C m}$, is $\pm 9 \times 10^3\text{ V}$. (Take $\frac{1}{4\pi \epsilon_0} = 9 \times 10^9\text{ SI units}$). Reason R: $V = \pm \frac{2P}{4\pi \epsilon_0 r^2}$, where r is the distance of any axial point, situated at $2\text{ m}$ from the centre of the dipole.

A. Both A and R are true and R is NOT the correct explanation of A.
B. A is true but R is false.
C. A is false but R is true.
D. Both A and R are true and R is the correct explanation of A.

Correct answer & explanation hidden

Log in to view solution →

Q30 PHYSICS Unit 11: Electrostatics

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : The potential (V) at any axial point, at 2 m distance(r) from the centre of the dipole of dipole moment vector $\vec{P}$ of magnitude, $4 \times 10^{-6}$ C m. is $\pm 9 \times 10^3$ V . (Take $\frac{1}{4\pi \epsilon_0} = 9 \times 10^9$ SI units) Reason R : $V = \pm \frac{2P}{4\pi \epsilon_0 r^2}$, where $r$ is the distance of any axial point, situated at 2 m from the centre of the dipole. In the light of the above statements, choose the correct answer from the options given below:

↻ Repeated question — also appeared in 2024 (3 sets)

A. Both A and R are true and R is NOT the correct explanation of A.
B. A is true but R is false.
C. A is false but R is true.
D. Both A and R are true and R is the correct explanation of A.

Correct answer & explanation hidden

Log in to view solution →

Q31 PHYSICS Unit 2: Kinematics

At any instant of time t, the displacement of any particle is given by $s = 2t-1$ (SI unit) under the influence of force of 5N. The value of instantaneous power is (in SI unit):

A. 5
B. 7
C. 6
D. 10

Correct answer & explanation hidden

Log in to view solution →

Q32 PHYSICS Unit 20: Experimental Skills

In a vernier calipers, $(N + 1)$ divisions of vernier scale coincide with $N$ divisions of main scale. If 1 MSD represents 0.1 mm, the vernier constant (in cm) is:

↻ Repeated question — also appeared in 2024 (2 sets)

A. $\frac{1}{100(N + 1)}$
B. $\frac{1}{100N}$
C. $\frac{10}{N + 1}$
D. $\frac{1}{10N}$

Correct answer & explanation hidden

Log in to view solution →

Q33 PHYSICS Unit 5: Rotational Motion

The moment of inertia of a thin rod about an axis passing through its mid point and perpendicular to the rod is 2400 g cm$^2$. The length of the 400 g rod is nearly :

↻ Repeated question — also appeared in 2024 (4 sets)

A. 17.5 cm
B. 20.7 cm
C. 72.0 cm
D. 8.5 cm

Correct answer & explanation hidden

Log in to view solution →

Q34 PHYSICS Unit 16: Optics

A light ray enters through a right angled prism at point P with the angle of incidence 30° as shown in figure. It travels through the prism parallel to its base BC and emerges along the face AC. The refractive index of the prism is:

↻ Repeated question — also appeared in 2024 (4 sets)

A. $\frac{\sqrt{5}}{2}$
B. $\frac{\sqrt{3}}{4}$
C. $\frac{\sqrt{3}}{2}$
D. $\frac{\sqrt{5}}{4}$

Correct answer & explanation hidden

Log in to view solution →

Q35 PHYSICS Unit 6: Gravitation

The mass of a planet is $\frac{1}{10}$ th that of the earth and its diameter is half that of the earth. The acceleration due to gravity on that planet is :

↻ Repeated question — also appeared in 2024 (4 sets)

A. 9.8 m s$^{-2}$
B. 4.9 m s$^{-2}$
C. 3.92 m s$^{-2}$
D. 19.6 m s$^{-2}$

Correct answer & explanation hidden

Log in to view solution →

Q36 PHYSICS Unit 15: Electromagnetic Waves

The property which is not of an electromagnetic wave travelling in free space is that :

↻ Repeated question — also appeared in 2024 (3 sets)

A. the energy density in electric field is equal to energy density in magnetic field.
B. they travel with a speed equal to $\frac{1}{\sqrt{\mu_0 \epsilon_0}}$
C. they originate from charges moving with uniform speed.
D. they are transverse in nature.

Correct answer & explanation hidden

Log in to view solution →

Q37 PHYSICS Unit 2: Kinematics

The velocity (v)-time (t) plot of the motion of a body is shown below. The acceleration (a)-time (t) graph that best suits this motion is :

↻ Repeated question — also appeared in 2024 (3 sets)

A. Option 1 (positive, zero, negative acceleration)
B. Option 2 (positive, zero, negative acceleration pulses)
C. Option 3 (negative, zero, positive acceleration pulses)
D. Option 4 (variable)

Correct answer & explanation hidden

Log in to view solution →

Q38 PHYSICS Unit 7: Properties of Solids and Liquids

A metallic bar of Young's modulus, $0.5 \times 10^{11}$ N m$^{-2}$ and coefficient of linear thermal expansion $10^{-5}$ °C$^{-1}$, length 1 m and area of cross-section $10^{-3}$ m$^2$ is heated from 0°C to 100°C without expansion or bending. The compressive force developed in it is:

↻ Repeated question — also appeared in 2024 (2 sets)

A. 50 $\times 10^3$ N
B. 100 $\times 10^3$ N
C. 2 $\times 10^3$ N
D. 5 $\times 10^3$ N

Correct answer & explanation hidden

Log in to view solution →

Q39 PHYSICS Unit 10: Oscillations and Waves

If the mass of the bob in a simple pendulum is increased to thrice its original mass and its length is made half its original length, then the new time period of oscillation is $\frac{x}{2}$ times its original time period. Then the value of x is:

↻ Repeated question — also appeared in 2024 (3 sets)

A. $\sqrt{2}$
B. $2\sqrt{3}$
C. 4
D. $\sqrt{3}$

Correct answer & explanation hidden

Log in to view solution →

Q40 PHYSICS Unit 12: Current Electricity

Choose the correct circuit which can achieve the bridge balance.

↻ Repeated question — also appeared in 2024 (1 set)

A. Circuit 1
B. Circuit 2
C. Circuit 3
D. Circuit 4

Correct answer & explanation hidden

Log in to view solution →

Q41 PHYSICS Unit 1: Physics and Measurement

A force defined by $F = \alpha t^2 + \beta t$ acts on a particle at a given time $t$. The factor which is dimensionless, if $\alpha$ and $\beta$ are constants, is:

↻ Repeated question — also appeared in 2024 (3 sets)

A. $\alpha / \beta$
B. $\alpha \beta t$
C. $\alpha \beta / t$
D. $\beta t / \alpha$

Correct answer & explanation hidden

Log in to view solution →

Q43 PHYSICS Unit 13: Magnetic Effects of Current and Magnetism

An iron bar of length $L$ has magnetic moment $M$. It is bent at the middle of its length such that the two arms make an angle $60^\circ$ with each other. The magnetic moment of this new magnet is:

↻ Repeated question — also appeared in 2024 (3 sets)

A. $M/2$
B. $2M$
C. $M/\sqrt{3}$
D. $M$

Correct answer & explanation hidden

Log in to view solution →

Q44 PHYSICS Unit 6: Gravitation

The minimum energy required to launch a satellite of mass $m$ from the surface of earth of mass $M$ and radius $R$ in a circular orbit at an altitude of $2R$ from the surface of the earth is:

↻ Repeated question — also appeared in 2024 (3 sets)

A. $2GmM / 3R$
B. $GmM / 2R$
C. $GmM / 3R$
D. $5GmM / 6R$

Correct answer & explanation hidden

Log in to view solution →

Q47 PHYSICS Unit 12: Current Electricity

Two heaters A and B have power rating of 1 kW and 2 kW, respectively. These two are first connected in series and then in parallel to a fixed power source. The ratio of power outputs for these two cases is:

↻ Repeated question — also appeared in 2024 (1 set)

A. (1) 2:9
B. (2) 1:2
C. (3) 2:3
D. (4) 1:1

Correct answer & explanation hidden

Log in to view solution →

Q49 PHYSICS Unit 16: Optics

A small telescope has an objective of focal length 140 cm and an eye piece of focal length 5.0 cm. The magnifying power of telescope for viewing a distant object is:

↻ Repeated question — also appeared in 2024 (4 sets)

A. (1) 28
B. (2) 17
C. (3) 32
D. (4) 34

Correct answer & explanation hidden

Log in to view solution →

Q51 CHEMISTRY Unit 16: Organic Compounds Containing Halogens

The compound that will undergo $S_N1$ reaction with the fastest rate is:

↻ Repeated question — also appeared in 2024 (2 sets)

A. (1) Cyclohexyl bromide
B. (2) Bromobenzene
C. (3) 1-phenylethyl bromide
D. (4) Cyclopentyl bromide

Correct answer & explanation hidden

Log in to view solution →

Q52 CHEMISTRY Unit 1: Some Basic Concepts in Chemistry

The highest number of helium atoms is in:

↻ Repeated question — also appeared in 2024 (3 sets)

A. (1) 4 u of helium
B. (2) 4 g of helium
C. (3) 2.271098 L of helium at STP
D. (4) 4 mol of helium

Correct answer & explanation hidden

Log in to view solution →

Q55 CHEMISTRY Unit 2: Atomic Structure

The energy of an electron in the ground state ($n=1$) for $He^+$ ion is $-x$ J, then that for an electron in $n=2$ state for $Be^{3+}$ ion in J is:

↻ Repeated question — also appeared in 2024 (2 sets)

A. (1) x/9
B. (2) -4x
C. (3) -4/9 x
D. (4) -x

Correct answer & explanation hidden

Log in to view solution →

Q56 CHEMISTRY Unit 11: d- and f-Block Elements

The $E^0$ value for the $Mn^{3+}/Mn^{2+}$ couple is more positive than that of $Cr^{3+}/Cr^{2+}$ or $Fe^{3+}/Fe^{2+}$ due to change of:

↻ Repeated question — also appeared in 2024 (3 sets)

A. (1) $d^5$ to $d^2$ configuration
B. (2) $d^4$ to $d^5$ configuration
C. (3) $d^3$ to $d^5$ configuration
D. (4) $d^5$ to $d^4$ configuration

Correct answer & explanation hidden

Log in to view solution →

Q56 CHEMISTRY Unit 11: d- and f-Block Elements

The $E^0$ value for the $\text{Mn}^{3+}/\text{Mn}^{2+}$ couple is more positive than that of $\text{Cr}^{3+}/\text{Cr}^{2+}$ or $\text{Fe}^{3+}/\text{Fe}^{2+}$ due to change of:

↻ Repeated question — also appeared in 2024 (1 set)

A. $d^5$ to $d^2$ configuration
B. $d^4$ to $d^5$ configuration
C. $d^3$ to $d^5$ configuration
D. $d^5$ to $d^4$ configuration

Correct answer & explanation hidden

Log in to view solution →

Q57 CHEMISTRY Unit 15: Hydrocarbons

A compound with a molecular formula of $\text{C}_6\text{H}_{14}$ has two tertiary carbons. Its IUPAC name is:

↻ Repeated question — also appeared in 2024 (2 sets)

A. 2-methylpentane
B. 2,3-dimethylbutane
C. 2,2-dimethylbutane
D. n-hexane

Correct answer & explanation hidden

Log in to view solution →

Q58 CHEMISTRY Unit 15: Hydrocarbons

Given below are two statements: Statement I: The boiling point of three isomeric pentanes follows the order n-pentane > isopentane > neopentane. Statement II: When branching increases, the molecule attains a shape of sphere. This results in smaller surface area for contact, due to which the intermolecular forces between the spherical molecules are weak, thereby lowering the boiling point.

↻ Repeated question — also appeared in 2024 (2 sets)

A. Both Statement I and Statement II are incorrect.
B. Statement I is correct but Statement II is incorrect.
C. Statement I is incorrect but Statement II is correct.
D. Both Statement I and Statement II are correct.

Correct answer & explanation hidden

Log in to view solution →

Q59 CHEMISTRY Unit 17: Organic Compounds Containing Oxygen

Identify the correct reagents that would bring about the following transformation: $\text{Cyclohexyl}-\text{CH}_2-\text{CH}=\text{CH}_2 \rightarrow \text{Cyclohexyl}-\text{CH}_2-\text{CH}_2-\text{CHO}$

A. (i) $\text{BH}_3$ (ii) $\text{H}_2\text{O}_2/\text{OH}^-$ (iii) PCC
B. (i) $\text{BH}_3$ (ii) $\text{H}_2\text{O}_2/\text{OH}^-$ (iii) alk. $\text{KMnO}_4$ (iv) $\text{H}_3\text{O}^+$
C. (i) $\text{H}_2\text{O}/\text{H}^+$ (ii) PCC
D. (i) $\text{H}_2\text{O}/\text{H}^+$ (ii) $\text{CrO}_3$

Correct answer & explanation hidden

Log in to view solution →

Q60 CHEMISTRY Unit 8: Chemical Kinetics

Which plot of ln k vs $1/T$ is consistent with Arrhenius equation?

↻ Repeated question — also appeared in 2024 (3 sets)

A. Plot 1 (Positive slope)
B. Plot 2 (Positive slope)
C. Plot 3 (Negative slope)
D. Plot 4 (Positive slope)

Correct answer & explanation hidden

Log in to view solution →

Q62 CHEMISTRY Unit 4: Chemical Thermodynamics

Match List I with List II. List I (Process): A. Isothermal, B. Isochoric, C. Isobaric, D. Adiabatic List II (Conditions): I. No heat exchange, II. Constant temperature, III. Constant volume, IV. Constant pressure

A. A-IV, B-II, C-III, D-I
B. A-I, B-II, C-III, D-IV
C. A-II, B-III, C-IV, D-I
D. A-IV, B-III, C-II, D-I

Correct answer & explanation hidden

Log in to view solution →

Q63 CHEMISTRY Unit 12: Coordination Compounds

Match List I with List II. List I (Complex) | List II (Type of isomerism) A. $[Co(NH_3)_5(NO_2)]Cl_2$ | I. Solvate isomerism B. $[Co(NH_3)_5(SO_4)]Br$ | II. Linkage isomerism C. $[Co(NH_3)_6][Cr(CN)_6]$ | III. Ionization isomerism D. $[Co(H_2O)_6]Cl_3$ | IV. Coordination isomerism

↻ Repeated question — also appeared in 2024 (1 set)

A. A-I, B-III, C-IV, D-II
B. A-I, B-IV, C-III, D-II
C. A-II, B-IV, C-III, D-I
D. A-II, B-III, C-IV, D-I

Correct answer & explanation hidden

Log in to view solution →

Q64 CHEMISTRY Unit 1: Some Basic Concepts in Chemistry

1 gram of sodium hydroxide was treated with 25 mL of 0.75 M HCl solution, the mass of sodium hydroxide left unreacted is equal to:

↻ Repeated question — also appeared in 2024 (5 sets)

A. 250 mg
B. Zero mg
C. 200 mg
D. 750 mg

Correct answer & explanation hidden

Log in to view solution →

Q64 CHEMISTRY Unit 1: Some Basic Concepts in Chemistry

1 gram of sodium hydroxide was treated with 25 mL of 0.75 M HCl solution, the mass of sodium hydroxide left unreacted is equal to

↻ Repeated question — also appeared in 2024 (5 sets)

A. 250 mg
B. Zero mg
C. 200 mg
D. 750 mg

Correct answer & explanation hidden

Log in to view solution →

Q65 CHEMISTRY Unit 7: Redox Reactions and Electrochemistry

Which reaction is NOT a redox reaction?

↻ Repeated question — also appeared in 2024 (5 sets)

A. $2\text{KClO}_3 + \text{I}_2 \rightarrow 2\text{KIO}_3 + \text{Cl}_2$
B. $\text{H}_2 + \text{Cl}_2 \rightarrow 2\text{HCl}$
C. $\text{BaCl}_2 + \text{Na}_2\text{SO}_4 \rightarrow \text{BaSO}_4 + 2\text{NaCl}$
D. $\text{Zn} + \text{CuSO}_4 \rightarrow \text{ZnSO}_4 + \text{Cu}$

Correct answer & explanation hidden

Log in to view solution →

Q65 CHEMISTRY Unit 7: Redox Reactions and Electrochemistry

Which reaction is NOT a redox reaction?

↻ Repeated question — also appeared in 2024 (5 sets)

A. 2 KClO_3 + I_2 \rightarrow 2 KIO_3 + Cl_2
B. H_2 + Cl_2 \rightarrow 2 HCl
C. BaCl_2 + Na_2SO_4 \rightarrow BaSO_4 + 2 NaCl
D. Zn + CuSO_4 \rightarrow ZnSO_4 + Cu

Correct answer & explanation hidden

Log in to view solution →

Q66 CHEMISTRY Unit 6: Equilibrium

For the reaction $2\text{A} \rightleftharpoons \text{B} + \text{C}$, $K_c = 4 \times 10^{-3}$. At a given time, the composition of reaction mixture is: $[\text{A}]=[\text{B}]=[\text{C}] = 2 \times 10^{-3} \text{ M}$. Then, which of the following is correct?

A. Reaction has a tendency to go in forward direction.
B. Reaction has a tendency to go in backward direction.
C. Reaction has gone to completion in forward direction.
D. Reaction is at equilibrium.

Correct answer & explanation hidden

Log in to view solution →

Q66 CHEMISTRY Unit 6: Equilibrium

For the reaction $2A \rightleftharpoons B + C$, $K_c = 4 \times 10^{-3}$. At a given time, the composition of reaction mixture is: $[A] = [B] = [C] = 2 \times 10^{-3} M$. Then, which of the following is correct?

↻ Repeated question — also appeared in 2024 (4 sets)

A. Reaction has a tendency to go in forward direction.
B. Reaction has a tendency to go in backward direction.
C. Reaction has gone to completion in forward direction.
D. Reaction is at equilibrium.

Correct answer & explanation hidden

Log in to view solution →

Q67 CHEMISTRY Unit 3: Chemical Bonding and Molecular Structure

↻ Repeated question — also appeared in 2024 (4 sets)

A. A-II, B-IV, C-III, D-I
B. A-III, B-IV, C-I, D-II
C. A-II, B-III, C-IV, D-I
D. A-I, B-IV, C-II, D-III

Correct answer & explanation hidden

Log in to view solution →

Q67 CHEMISTRY Unit 3: Chemical Bonding and Molecular Structure

↻ Repeated question — also appeared in 2024 (4 sets)

A. (1) A-II, B-IV, C-III, D-I
B. (2) A-III, B-IV, C-I, D-II
C. (3) A-II, B-III, C-IV, D-I
D. (4) A-I, B-IV, C-II, D-III

Correct answer & explanation hidden

Log in to view solution →

Q68 CHEMISTRY Unit 13: Purification and Characterisation of Organic Compounds

On heating, some solid substances change from solid to vapour state without passing through liquid state. The technique used for the purification of such solid substances based on the above principle is known as

↻ Repeated question — also appeared in 2024 (5 sets)

A. Sublimation
B. Distillation
C. Chromatography
D. Crystallization

Correct answer & explanation hidden

Log in to view solution →

Q68 CHEMISTRY Unit 13: Purification and Characterisation of Organic Compounds

On heating, some solid substances change from solid to vapour state without passing through liquid state. The technique used for the purification of such solid substances based on the above principle is known as

↻ Repeated question — also appeared in 2024 (5 sets)

A. Sublimation
B. Distillation
C. Chromatography
D. Crystallization

Correct answer & explanation hidden

Log in to view solution →

Q69 CHEMISTRY Unit 6: Equilibrium

In which of the following equilibria, $K_p$ and $K_c$ are NOT equal?

↻ Repeated question — also appeared in 2024 (5 sets)

A. H_2(g) + I_2(g) \rightleftharpoons 2 HI(g)
B. CO(g) + H_2O(g) \rightleftharpoons CO_2(g) + H_2(g)
C. 2 BrCl(g) \rightleftharpoons Br_2(g) + Cl_2(g)
D. PCl_5(g) \rightleftharpoons PCl_3(g) + Cl_2(g)

Correct answer & explanation hidden

Log in to view solution →

Q69 CHEMISTRY Unit 6: Equilibrium

In which of the following equilibria, $K_p$ and $K_c$ are NOT equal?

↻ Repeated question — also appeared in 2024 (5 sets)

A. $H_2(g) + I_2(g) \rightleftharpoons 2 HI(g)$
B. $CO(g) + H_2O(g) \rightleftharpoons CO_2(g) + H_2(g)$
C. $2 BrCl(g) \rightleftharpoons Br_2(g) + Cl_2(g)$
D. $PCl_5(g) \rightleftharpoons PCl_3(g) + Cl_2(g)$

Correct answer & explanation hidden

Log in to view solution →

Q70 CHEMISTRY Unit 10: p-Block Elements

Among Group 16 elements, which one does NOT show -2 oxidation state?

↻ Repeated question — also appeared in 2024 (5 sets)

A. Se
B. Te
C. Po
D. O

Correct answer & explanation hidden

Log in to view solution →

Q70 CHEMISTRY Unit 10: p-Block Elements

Among Group 16 elements, which one does NOT show -2 oxidation state?

↻ Repeated question — also appeared in 2024 (5 sets)

A. Se
B. Te
C. Po
D. O

Correct answer & explanation hidden

Log in to view solution →

Q71 CHEMISTRY Unit 10: p-Block Elements

Given below are two statements: Statement I : The boiling point of hydrides of Group 16 elements follow the order $H_2O > H_2Te > H_2Se > H_2S$. Statement II : On the basis of molecular mass, $H_2O$ is expected to have lower boiling point than the other members of the group but due to the presence of extensive H-bonding in $H_2O$, it has higher boiling point. In the light of the above statements, choose the correct answer from the options given below:

↻ Repeated question — also appeared in 2024 (5 sets)

A. Both Statement I and Statement II are false.
B. Statement I is true but Statement II is false.
C. Statement I is false but Statement II is true.
D. Both Statement I and Statement II are true.

Correct answer & explanation hidden

Log in to view solution →

Q71 CHEMISTRY Unit 10: p-Block Elements

Given below are two statements: Statement I : The boiling point of hydrides of Group 16 elements follow the order $H_2O > H_2Te > H_2Se > H_2S$. Statement II : On the basis of molecular mass, $H_2O$ is expected to have lower boiling point than the other members of the group but due to the presence of extensive H-bonding in $H_2O$, it has higher boiling point. In the light of the above statements, choose the correct answer from the options given below:

↻ Repeated question — also appeared in 2024 (5 sets)

A. Both Statement I and Statement II are false.
B. Statement I is true but Statement II is false.
C. Statement I is false but Statement II is true.
D. Both Statement I and Statement II are true.

Correct answer & explanation hidden

Log in to view solution →

Q72 CHEMISTRY Unit 18: Organic Compounds Containing Nitrogen

Given below are two statements: Statement I : Aniline does not undergo Friedel-Crafts alkylation reaction. Statement II : Aniline cannot be prepared through Gabriel synthesis. In the light of the above statements, choose the correct answer from the options given below:

↻ Repeated question — also appeared in 2024 (3 sets)

A. Both Statement I and Statement II are false.
B. Statement I is correct but Statement II is false.
C. Statement I is incorrect but Statement II is true.
D. Both Statement I and Statement II are true.

Correct answer & explanation hidden

Log in to view solution →

Q73 CHEMISTRY Unit 12: Coordination Compounds

Given below are two statements: Statement I : Both $[Co(NH_3)_6]^{3+}$ and $[CoF_6]^{3-}$ complexes are octahedral but differ in their magnetic behaviour. Statement II : $[Co(NH_3)_6]^{3+}$ is diamagnetic whereas $[CoF_6]^{3-}$ is paramagnetic. In the light of the above statements, choose the correct answer from the options given below:

↻ Repeated question — also appeared in 2024 (4 sets)

A. Both Statement I and Statement II are false.
B. Statement I is true but Statement II is false.
C. Statement I is false but Statement II is true.
D. Both Statement I and Statement II are true.

Correct answer & explanation hidden

Log in to view solution →

Q74 CHEMISTRY Unit 17: Organic Compounds Containing Oxygen

Fehling's solution 'A' is

↻ Repeated question — also appeared in 2024 (3 sets)

A. alkaline copper sulphate
B. alkaline solution of sodium potassium tartrate (Rochelle's salt)
C. aqueous sodium citrate
D. aqueous copper sulphate

Correct answer & explanation hidden

Log in to view solution →

Q75 CHEMISTRY Unit 5: Solutions

The Henry's law constant ($K_H$) values of three gases (A, B, C) in water are 145, $2 \times 10^{-5}$ and 35 kbar, respectively. The solubility of these gases in water follow the order:

↻ Repeated question — also appeared in 2024 (4 sets)

A. B > C > A
B. A > C > B
C. A > B > C
D. B > A > C

Correct answer & explanation hidden

Log in to view solution →

Q76 CHEMISTRY Unit 7: Redox Reactions and Electrochemistry

Match List I with List II. List I (Conversion) | List II (Number of Faraday required) A. 1 mol of $H_2O$ to $O_2$ | I. 3F B. 1 mol of $MnO_4^-$ to $Mn^{2+}$ | II. 2F C. 1.5 mol of Ca from molten $CaCl_2$ | III. 1F D. 1 mol of FeO to $Fe_2O_3$ | IV. 5F Choose the correct answer from the options given below:

A. (1) A-III, B-IV, C-I, D-II
B. (2) A-II, B-III, C-I, D-IV
C. (3) A-III, B-IV, C-II, D-I
D. (4) A-II, B-IV, C-I, D-III

Correct answer & explanation hidden

Log in to view solution →

Q77 CHEMISTRY Unit 2: Atomic Structure

↻ Repeated question — also appeared in 2024 (2 sets)

A. A-III, B-IV, C-I, D-II
B. A-III, B-IV, C-II, D-I
C. A-II, B-I, C-IV, D-III
D. A-I, B-III, C-II, D-IV

Correct answer & explanation hidden

Log in to view solution →

Q78 CHEMISTRY Unit 12: Coordination Compounds

'Spin only' magnetic moment is same for which of the following ions? A. $Ti^{3+}$ B. $Cr^{2+}$ C. $Mn^{2+}$ D. $Fe^{2+}$ E. $Sc^{3+}$

A. A and E only
B. B and C only
C. A and D only
D. B and D only

Correct answer & explanation hidden

Log in to view solution →

Q79 CHEMISTRY Unit 19: Biomolecules

The reagents with which glucose does not react to give the corresponding tests/products are: A. Tollen's reagent B. Schiff's reagent C. HCN D. $NH_2OH$ E. $NaHSO_3$

A. A and D
B. B and E
C. E and D
D. B and C

Correct answer & explanation hidden

Log in to view solution →

Q81 CHEMISTRY Unit 9: Classification of Elements and Periodicity in Properties

Arrange the following elements in increasing order of electronegativity: N, O, F, C, Si

↻ Repeated question — also appeared in 2024 (3 sets)

A. Si < C < O < N < F
B. O < F < N < C < Si
C. F < O < N < C < Si
D. Si < C < N < O < F

Correct answer & explanation hidden

Log in to view solution →

Q81 CHEMISTRY Unit 9: Classification of Elements and Periodicity in Properties

Arrange the following elements in increasing order of electronegativity: N, O, F, C, Si

↻ Repeated question — also appeared in 2024 (3 sets)

A. Si < C < O < N < F
B. O < F < N < C < Si
C. F < O < N < C < Si
D. Si < C < N < O < F

Correct answer & explanation hidden

Log in to view solution →

Q82 CHEMISTRY Unit 15: Hydrocarbons

Match List I with List II. List I (Molecule) | List II (Number and types of bond/s between two carbon atoms) A. ethane | I. one $\sigma$-bond and two $\pi$-bonds B. ethene | II. two $\pi$-bonds C. carbon molecule, $C_2$ | III. one $\sigma$-bond D. ethyne | IV. one $\sigma$-bond and one $\pi$-bond

↻ Repeated question — also appeared in 2024 (1 set)

A. A-IV, B-III, C-II, D-I
B. A-III, B-IV, C-II, D-I
C. A-III, B-IV, C-I, D-II
D. A-I, B-IV, C-II, D-III

Correct answer & explanation hidden

Log in to view solution →

Q82 CHEMISTRY Unit 3: Chemical Bonding and Molecular Structure

Match List I with List II: List I (Molecule): A. ethane B. ethene C. carbon molecule, C2 D. ethyne List II (Number and types of bond/s between two carbon atoms): I. one $\sigma$-bond and two $\pi$-bonds II. two $\pi$-bonds III. one $\sigma$-bond IV. one $\sigma$-bond and one $\pi$-bond

↻ Repeated question — also appeared in 2024 (1 set)

A. A-IV, B-III, C-II, D-I
B. A-III, B-IV, C-II, D-I
C. A-III, B-IV, C-I, D-II
D. A-I, B-IV, C-II, D-III

Correct answer & explanation hidden

Log in to view solution →

Q83 CHEMISTRY Unit 9: Classification of Elements and Periodicity in Properties

Arrange the following elements in increasing order of first ionization enthalpy: Li, Be, B, C, N

↻ Repeated question — also appeared in 2024 (2 sets)

A. Li < B < Be < C < N
B. Li < Be < C < B < N
C. Li < Be < N < B < C
D. Li < Be < B < C < N

Correct answer & explanation hidden

Log in to view solution →

Q83 CHEMISTRY Unit 9: Classification of Elements and Periodicity in Properties

Arrange the following elements in increasing order of first ionization enthalpy: Li, Be, B, C, N

↻ Repeated question — also appeared in 2024 (2 sets)

A. Li < B < Be < C < N
B. Li < Be < C < B < N
C. Li < Be < N < B < C
D. Li < Be < B < C < N

Correct answer & explanation hidden

Log in to view solution →

Q84 CHEMISTRY Unit 14: Some Basic Principles of Organic Chemistry

Which one of the following alcohols reacts instantaneously with Lucas reagent?

A. CH3-CH2-CH-OH (with CH3 branch)
B. CH3-CH-CH2OH (with CH3 branch)
C. CH3-C(CH3)2-OH
D. CH3-CH2-CH2-CH2OH

Correct answer & explanation hidden

Log in to view solution →

Q84 CHEMISTRY Unit 17: Organic Compounds Containing Oxygen

Which one of the following alcohols reacts instantaneously with Lucas reagent?

↻ Repeated question — also appeared in 2024 (3 sets)

A. CH3-CH2-CH(CH3)-OH
B. CH3-CH(CH3)-CH2OH
C. CH3-C(CH3)2-OH
D. CH3-CH2-CH2-CH2OH

Correct answer & explanation hidden

Log in to view solution →

Q85 CHEMISTRY Unit 8: Chemical Kinetics

Activation energy of any chemical reaction can be calculated if one knows the value of:

↻ Repeated question — also appeared in 2024 (5 sets)

A. probability of collision.
B. orientation of reactant molecules during collision.
C. rate constant at two different temperatures.
D. rate constant at standard temperature.

Correct answer & explanation hidden

Log in to view solution →

Q85 CHEMISTRY Unit 8: Chemical Kinetics

Activation energy of any chemical reaction can be calculated if one knows the value of

↻ Repeated question — also appeared in 2024 (5 sets)

A. probability of collision.
B. orientation of reactant molecules during collision.
C. rate constant at two different temperatures.
D. rate constant at standard temperature.

Correct answer & explanation hidden

Log in to view solution →

Q86 CHEMISTRY Unit 3: Chemical Bonding and Molecular Structure

Identify the correct answer.

↻ Repeated question — also appeared in 2024 (5 sets)

A. BF3 has non-zero dipole moment.
B. Dipole moment of NF3 is greater than that of NH3.
C. Three canonical forms can be drawn for CO3 2- ion.
D. Three resonance structures can be drawn for ozone.

Correct answer & explanation hidden

Log in to view solution →

Q86 CHEMISTRY Unit 3: Chemical Bonding and Molecular Structure

Identify the correct answer.

↻ Repeated question — also appeared in 2024 (5 sets)

A. BF3 has non-zero dipole moment.
B. Dipole moment of NF3 is greater than that of NH3.
C. Three canonical forms can be drawn for CO3^{2-} ion.
D. Three resonance structures can be drawn for ozone.

Correct answer & explanation hidden

Log in to view solution →

Q87 CHEMISTRY Unit 11: d- and f-Block Elements

The pair of lanthanoid ions which are diamagnetic is

↻ Repeated question — also appeared in 2024 (5 sets)

A. Ce3+ and Eu2+
B. Gd3+ and Eu3+
C. Pm3+ and Sm3+
D. Ce4+ and Yb2+

Correct answer & explanation hidden

Log in to view solution →

Q87 CHEMISTRY Unit 11: d- and f-Block Elements

The pair of lanthanoid ions which are diamagnetic is

↻ Repeated question — also appeared in 2024 (5 sets)

A. Ce^{3+} and Eu^{2+}
B. Gd^{3+} and Eu^{3+}
C. Pm^{3+} and Sm^{3+}
D. Ce^{4+} and Yb^{2+}

Correct answer & explanation hidden

Log in to view solution →

Q88 CHEMISTRY Unit 8: Chemical Kinetics

The rate of a reaction quadruples when temperature changes from 27°C to 57°C. Calculate the energy of activation. Given R = 8.314 J K-1 mol-1, log 4 = 0.6021

↻ Repeated question — also appeared in 2024 (4 sets)

A. 380.4 kJ/mol
B. 3.80 kJ/mol
C. 3804 kJ/mol
D. 38.04 kJ/mol

Correct answer & explanation hidden

Log in to view solution →

Q88 CHEMISTRY Unit 8: Chemical Kinetics

The rate of a reaction quadruples when temperature changes from 27°C to 57°C. Calculate the energy of activation. Given $R = 8.314 \text{ J K}^{-1} \text{ mol}^{-1}$, $\log 4 = 0.6021$

↻ Repeated question — also appeared in 2024 (4 sets)

A. 380.4 kJ/mol
B. 3.80 kJ/mol
C. 3804 kJ/mol
D. 38.04 kJ/mol

Correct answer & explanation hidden

Log in to view solution →

Q89 CHEMISTRY Unit 17: Organic Compounds Containing Oxygen

For the given reaction: (Cyclohexyl)-CH=CH2 + KMnO4/H+ -> 'P' (major product). 'P' is

A. (Cyclohexyl)-COOH
B. (Cyclohexyl)-CH(OH)-CH2(OH)-(Cyclohexyl)
C. O=C-C=O
D. (Cyclohexyl)-CHO

Correct answer & explanation hidden

Log in to view solution →

Q89 CHEMISTRY Unit 15: Hydrocarbons

For the given reaction: (refer to image for structure) KMnO4/H^+ -> 'P' (major product). 'P' is

A. Cyclohexanecarboxylic acid
B. 1,2-dihydroxycyclohexane derivative
C. Diketone derivative
D. Cyclohexanecarbaldehyde

Correct answer & explanation hidden

Log in to view solution →

Q90 CHEMISTRY Unit 4: Chemical Thermodynamics

The work done during reversible isothermal expansion of one mole of hydrogen gas at 25°C from pressure of 20 atmosphere to 10 atmosphere is: (Given R = 2.0 cal K-1 mol-1)

↻ Repeated question — also appeared in 2024 (5 sets)

A. -413.14 calories
B. 413.14 calories
C. 100 calories
D. 0 calorie

Correct answer & explanation hidden

Log in to view solution →

Q90 CHEMISTRY Unit 4: Chemical Thermodynamics

The work done during reversible isothermal expansion of one mole of hydrogen gas at 25°C from pressure of 20 atmosphere to 10 atmosphere is: (Given $R = 2.0 \text{ cal K}^{-1} \text{ mol}^{-1}$)

↻ Repeated question — also appeared in 2024 (5 sets)

A. - 413.14 calories
B. 413.14 calories
C. 100 calories
D. 0 calorie

Correct answer & explanation hidden

Log in to view solution →

Q91 CHEMISTRY Unit 16: Organic Compounds Containing Halogens

The products A and B obtained in the following reactions, respectively, are 3ROH + PCl3 -> 3RCl + A ROH + PCl5 -> RCl + HCl + B

↻ Repeated question — also appeared in 2024 (4 sets)

A. POCl3 and H3PO4
B. H3PO4 and POCl3
C. H3PO3 and POCl3
D. POCl3 and H3PO3

Correct answer & explanation hidden

Log in to view solution →

Q91 CHEMISTRY Unit 16: Organic Compounds Containing Halogens

The products A and B obtained in the following reactions, respectively, are: $3ROH + PCl_3 \rightarrow 3RCl + A$ $ROH + PCl_5 \rightarrow RCl + HCl + B$

↻ Repeated question — also appeared in 2024 (4 sets)

A. POCl3 and H3PO4
B. H3PO4 and POCl3
C. H3PO3 and POCl3
D. POCl3 and H3PO3

Correct answer & explanation hidden

Log in to view solution →

Q92 CHEMISTRY Unit 20: Principles Related to Practical Chemistry

Given below are certain cations. Using inorganic qualitative analysis, arrange them in increasing group number from 0 to VI. A. Al^{3+} B. Cu^{2+} C. Ba^{2+} D. Co^{2+} E. Mg^{2+}

A. B, C, A, D, E
B. E, C, D, B, A
C. E, A, B, C, D
D. B, A, D, C, E

Correct answer & explanation hidden

Log in to view solution →

Q93 CHEMISTRY Unit 5: Solutions

The plot of osmotic pressure ($\Pi$) vs concentration ($mol L^{-1}$) for a solution gives a straight line with slope 25.73 L bar $mol^{-1}$. The temperature at which the osmotic pressure measurement is done is: (Use $R = 0.083 L bar mol^{-1} K^{-1}$)

↻ Repeated question — also appeared in 2024 (3 sets)

A. 310°C
B. 25.73°C
C. 12.05°C
D. 37°C

Correct answer & explanation hidden

Log in to view solution →

Q94 CHEMISTRY Unit 1: Some Basic Concepts in Chemistry

A compound X contains 32% of A, 20% of B and remaining percentage of C. Then, the empirical formula of X is: (Given atomic masses of A = 64; B = 40; C = 32 u)

↻ Repeated question — also appeared in 2024 (4 sets)

A. ABC3
B. AB2C2
C. ABC4
D. A2BC2

Correct answer & explanation hidden

Log in to view solution →

Q95 CHEMISTRY Unit 16: Organic Compounds Containing Halogens

Major products A and B formed in the following reaction sequence, are: (Refer to image 2 for diagram)

A. A = 1-methyl-2-bromocyclohexane, B = 3-methylcyclohexene
B. A = 1-methyl-2-bromocyclohexane, B = 1-methylcyclohexene
C. A = 2-methylcyclohexyl bromide, B = 2-methylcyclohexanone
D. A = 1-methyl-1-bromocyclohexane, B = cyclohexene

Correct answer & explanation hidden

Log in to view solution →

Q96 CHEMISTRY Unit 12: Coordination Compounds

During the preparation of Mohr's salt solution (Ferrous ammonium sulphate), which of the following acid is added to prevent hydrolysis of Fe^{2+} ion?

A. concentrated sulphuric acid
B. dilute nitric acid
C. dilute sulphuric acid
D. dilute hydrochloric acid

Correct answer & explanation hidden

Log in to view solution →

Q97 CHEMISTRY Unit 6: Equilibrium

Consider the following reaction in a sealed vessel at equilibrium with concentrations of $N_2 = 3.0 \times 10^{-3} M, O_2 = 4.2 \times 10^{-3} M$ and $NO = 2.8 \times 10^{-3} M$. $2NO(g) \rightleftharpoons N_2(g) + O_2(g)$. If 0.1 mol $L^{-1}$ of NO(g) is taken in a closed vessel, what will be degree of dissociation ($\alpha$) of NO(g) at equilibrium?

↻ Repeated question — also appeared in 2024 (1 set)

A. 0.0889
B. 0.8889
C. 0.717
D. 0.00889

Correct answer & explanation hidden

Log in to view solution →

Q98 CHEMISTRY Unit 18: Organic Compounds Containing Nitrogen

Identify the major product C formed in the following reaction sequence: $CH_3-CH_2-CH_2-I \xrightarrow{NaCN} A \xrightarrow{OH^-, \text{partial hydrolysis}} B \xrightarrow{NaOH, Br_2} C$

↻ Repeated question — also appeared in 2024 (1 set)

A. butylamine
B. butanamide
C. alpha-bromobutanoic acid
D. propylamine

Correct answer & explanation hidden

Log in to view solution →

Q98 CHEMISTRY Unit 14: Some Basic Principles of Organic Chemistry

Identify the major product C formed in the following reaction sequence: $$CH_3-CH_2-CH_2-I \xrightarrow{NaCN} A \xrightarrow[Partial\ hydrolysis]{OH^-} B \xrightarrow{NaOH/Br_2} C (major)$$

↻ Repeated question — also appeared in 2024 (1 set)

A. butylamine
B. butanamide
C. α-bromobutanoic acid
D. propylamine

Correct answer & explanation hidden

Log in to view solution →

Q101 BIOLOGY Unit 3: Cell Structure and Function

Lecithin, a small molecular weight organic compound found in living tissues, is an example of:

↻ Repeated question — also appeared in 2024 (1 set)

A. Phospholipids
B. Glycerides
C. Carbohydrates
D. Amino acids

Correct answer & explanation hidden

Log in to view solution →

Q102 BIOLOGY Unit 10: Ecology and Environment

These are regarded as major causes of biodiversity loss: A. Over exploitation B. Co-extinction C. Mutation D. Habitat loss and fragmentation E. Migration Choose the correct option:

↻ Repeated question — also appeared in 2024 (4 sets)

A. A, B, C and D only
B. A, B and E only
C. A, B and D only
D. A, C and D only

Correct answer & explanation hidden

Log in to view solution →

Q103 BIOLOGY Unit 1: Diversity in Living World

Which one of the following is not a criterion for classification of fungi?

↻ Repeated question — also appeared in 2024 (5 sets)

A. Mode of nutrition
B. Mode of spore formation
C. Fruiting body
D. Morphology of mycelium

Correct answer & explanation hidden

Log in to view solution →

Q103 BIOLOGY Unit 1: Diversity in Living World

Which one of the following is not a criterion for classification of fungi?

↻ Repeated question — also appeared in 2024 (5 sets)

A. Mode of nutrition
B. Mode of spore formation
C. Fruiting body
D. Morphology of mycelium

Correct answer & explanation hidden

Log in to view solution →

Q104 BIOLOGY Unit 7: Genetics and Evolution

A pink flowered Snapdragon plant was crossed with a red flowered Snapdragon plant. What type of phenotype/s is/are expected in the progeny?

↻ Repeated question — also appeared in 2024 (5 sets)

A. Red flowered as well as pink flowered plants
B. Only pink flowered plants
C. Red, Pink as well as white flowered plants
D. Only red flowered plants

Correct answer & explanation hidden

Log in to view solution →

Q104 BIOLOGY Unit 7: Genetics and Evolution

A pink flowered Snapdragon plant was crossed with a red flowered Snapdragon plant. What type of phenotype/s is/are expected in the progeny?

↻ Repeated question — also appeared in 2024 (5 sets)

A. Red flowered as well as pink flowered plants
B. Only pink flowered plants
C. Red, Pink as well as white flowered plants
D. Only red flowered plants

Correct answer & explanation hidden

Log in to view solution →

Q105 BIOLOGY Unit 7: Genetics and Evolution

Which one of the following can be explained on the basis of Mendel's Law of Dominance? A. Out of one pair of factors one is dominant and the other is recessive. B. Alleles do not show any expression and both the characters appear as such in F2 generation. C. Factors occur in pairs in normal diploid plants. D. The discrete unit controlling a particular character is called factor. E. The expression of only one of the parental characters is found in a monohybrid cross. Choose the correct answer from the options given below:

↻ Repeated question — also appeared in 2024 (3 sets)

A. A, C, D and E only
B. B, C and D only
C. A, B, C, D and E
D. A, B and C only

Correct answer & explanation hidden

Log in to view solution →

Q106 BIOLOGY Unit 10: Ecology and Environment

Tropical regions show greatest level of species richness because: A. Tropical latitudes have remained relatively undisturbed for millions of years, hence more time was available for species diversification. B. Tropical environments are more seasonal. C. More solar energy is available in tropics. D. Constant environments promote niche specialization. E. Tropical environments are constant and predictable.

↻ Repeated question — also appeared in 2024 (3 sets)

A. A and B only
B. A, B and E only
C. A, B and D only
D. A, C, D and E only

Correct answer & explanation hidden

Log in to view solution →

Q107 BIOLOGY Unit 2: Structural Organisation in Animals and Plants

In the given figure, which component has thin outer walls and highly thickened inner walls?

↻ Repeated question — also appeared in 2024 (3 sets)

A. D
B. A
C. B
D. C

Correct answer & explanation hidden

Log in to view solution →

Q108 BIOLOGY Unit 3: Cell Structure and Function

The cofactor of the enzyme carboxypeptidase is:

↻ Repeated question — also appeared in 2024 (4 sets)

A. Niacin
B. Flavin
C. Haem
D. Zinc

Correct answer & explanation hidden

Log in to view solution →

Q109 BIOLOGY Unit 3: Cell Structure and Function

Given below are two statements: Statement I : Chromosomes become gradually visible under light microscope during leptotene stage. Statement II : The beginning of diplotene stage is recognized by dissolution of synaptonemal complex. In the light of the above statements, choose the correct answer from the options given below:

↻ Repeated question — also appeared in 2024 (2 sets)

A. Both Statement I and Statement II are false
B. Statement I is true but Statement II is false
C. Statement I is false but Statement II is true
D. Both Statement I and Statement II are true

Correct answer & explanation hidden

Log in to view solution →

Q110 BIOLOGY Unit 9: Biotechnology and Its Applications

What is the fate of a piece of DNA carrying only gene of interest which is transferred into an alien organism? A. The piece of DNA would be able to multiply itself independently in the progeny cells of the organism. B. It may get integrated into the genome of the recipient. C. It may multiply and be inherited along with the host DNA. D. The alien piece of DNA is not an integral part of chromosome. E. It shows ability to replicate.

↻ Repeated question — also appeared in 2024 (3 sets)

A. D and E only
B. B and C only
C. A and E only
D. A and B only

Correct answer & explanation hidden

Log in to view solution →

Q110 BIOLOGY Unit 9: Biotechnology and Its Applications

What is the fate of a piece of DNA carrying only gene of interest which is transferred into an alien organism?

A. The piece of DNA would be able to multiply itself independently in the progeny cells of the organism.
B. It may get integrated into the genome of the recipient.
C. It may multiply and be inherited along with the host DNA.
D. The alien piece of DNA is not an integral part of chromosome.

Correct answer & explanation hidden

Log in to view solution →

Q111 BIOLOGY Unit 2: Structural Organisation in Animals and Plants

Identify the type of flowers based on the position of calyx, corolla and androecium with respect to the ovary from the given figures (a) and (b)

↻ Repeated question — also appeared in 2024 (5 sets)

A. (a) Hypogynous; (b) Epigynous
B. (a) Perigynous; (b) Epigynous
C. (a) Perigynous; (b) Perigynous
D. (a) Epigynous; (b) Hypogynous

Correct answer & explanation hidden

Log in to view solution →

Q111 BIOLOGY Unit 2: Structural Organisation in Animals and Plants

Identify the type of flowers based on the position of calyx, corolla and androecium with respect to the ovary from the given figures (a) and (b)

↻ Repeated question — also appeared in 2024 (5 sets)

A. (a) Hypogynous; (b) Epigynous
B. (a) Perigynous; (b) Epigynous
C. (a) Perigynous; (b) Perigynous
D. (a) Epigynous; (b) Hypogynous

Correct answer & explanation hidden

Log in to view solution →

Q112 BIOLOGY Unit 7: Genetics and Evolution

Match List I with List II: List I: A. Two or more alternative forms of a gene B. Cross of F1 progeny with homozygous recessive parent C. Cross of F1 progeny with any of the parents D. Number of chromosome sets in plant List II: I. Back cross II. Ploidy III. Allele IV. Test cross

↻ Repeated question — also appeared in 2024 (4 sets)

A. A-II, B-I, C-III, D-IV
B. A-III, B-IV, C-I, D-II
C. A-IV, B-III, C-II, D-I
D. A-I, B-II, C-III, D-IV

Correct answer & explanation hidden

Log in to view solution →

Q112 BIOLOGY Unit 7: Genetics and Evolution

Match List I with List II List I A. Two or more alternative forms of a gene B. Cross of F1 progeny with homozygous recessive parent C. Cross of F1 progeny with any of the parents D. Number of chromosome sets in plant List II I. Back cross II. Ploidy III. Allele IV. Test cross

↻ Repeated question — also appeared in 2024 (4 sets)

A. (1) A-II, B-I, C-III, D-IV
B. (2) A-III, B-IV, C-I, D-II
C. (3) A-IV, B-III, C-II, D-I
D. (4) A-I, B-II, C-III, D-IV

Correct answer & explanation hidden

Log in to view solution →

Q113 BIOLOGY Unit 2: Structural Organisation in Animals and Plants

Formation of interfascicular cambium from fully developed parenchyma cells is an example for

↻ Repeated question — also appeared in 2024 (3 sets)

A. Redifferentiation
B. Dedifferentiation
C. Maturation
D. Differentiation

Correct answer & explanation hidden

Log in to view solution →

Q113 BIOLOGY Unit 2: Structural Organisation in Animals and Plants

Formation of interfascicular cambium from fully developed parenchyma cells is an example for

↻ Repeated question — also appeared in 2024 (3 sets)

A. Redifferentiation
B. Dedifferentiation
C. Maturation
D. Differentiation

Correct answer & explanation hidden

Log in to view solution →

Q114 BIOLOGY Unit 2: Structural Organisation in Animals and Plants

Which of the following is an example of actinomorphic flower?

↻ Repeated question — also appeared in 2024 (5 sets)

A. Cassia
B. Pisum
C. Sesbania
D. Datura

Correct answer & explanation hidden

Log in to view solution →

Q114 BIOLOGY Unit 2: Structural Organisation in Animals and Plants

Which of the following is an example of actinomorphic flower?

↻ Repeated question — also appeared in 2024 (5 sets)

A. Cassia
B. Pisum
C. Sesbania
D. Datura

Correct answer & explanation hidden

Log in to view solution →

Q115 BIOLOGY Unit 9: Biotechnology and Its Applications

Hind II always cuts DNA molecules at a particular point called recognition sequence and it consists of:

↻ Repeated question — also appeared in 2024 (4 sets)

A. 6 bp
B. 4 bp
C. 10 bp
D. 8 bp

Correct answer & explanation hidden

Log in to view solution →

Q115 BIOLOGY Unit 9: Biotechnology and Its Applications

Hind II always cuts DNA molecules at a particular point called recognition sequence and it consists of:

↻ Repeated question — also appeared in 2024 (4 sets)

A. 6 bp
B. 4 bp
C. 10 bp
D. 8 bp

Correct answer & explanation hidden

Log in to view solution →

Q116 BIOLOGY Unit 4: Plant Physiology

Which of the following are required for the dark reaction of photosynthesis? A. Light B. Chlorophyll C. CO2 D. ATP E. NADPH

A. B, C and D only
B. C, D and E only
C. D and E only
D. A, B and C only

Correct answer & explanation hidden

Log in to view solution →

Q117 BIOLOGY Unit 9: Biotechnology and Its Applications

Given below are two statements: Statement I : Bt toxins are insect group specific and coded by a gene cry IAc. Statement II : Bt toxin exists as inactive protoxin in B. thuringiensis. However, after ingestion by the insect the inactive protoxin gets converted into active form due to acidic pH of the insect gut. In the light of the above statements, choose the correct answer from the options given below:

↻ Repeated question — also appeared in 2024 (4 sets)

A. Both Statement I and Statement II are false
B. Statement I is true but Statement II is false
C. Statement I is false but Statement II is true
D. Both Statement I and Statement II are true

Correct answer & explanation hidden

Log in to view solution →

Q118 BIOLOGY Unit 10: Ecology and Environment

The equation of Verhulst-Pearl logistic growth is dN/dt = rN(K-N/K). From this equation, K indicates:

↻ Repeated question — also appeared in 2024 (3 sets)

A. Biotic potential
B. Carrying capacity
C. Population density
D. Intrinsic rate of natural increase

Correct answer & explanation hidden

Log in to view solution →

Q118 BIOLOGY Unit 10: Ecology and Environment

The equation of Verhulst-Pearl logistic growth is $$\frac{dN}{dt} = rN \left[ \frac{K-N}{K} \right]$$. From this equation, K indicates:

↻ Repeated question — also appeared in 2024 (1 set)

A. Biotic potential
B. Carrying capacity
C. Population density
D. Intrinsic rate of natural increase

Correct answer & explanation hidden

Log in to view solution →

Q119 BIOLOGY Unit 9: Biotechnology and Its Applications

The capacity to generate a whole plant from any cell of the plant is called:

↻ Repeated question — also appeared in 2024 (2 sets)

A. Micro propagation
B. Differentiation
C. Somatic hybridization
D. Totipotency

Correct answer & explanation hidden

Log in to view solution →

Q119 BIOLOGY Unit 4: Plant Physiology

The capacity to generate a whole plant from any cell of the plant is called:

↻ Repeated question — also appeared in 2024 (2 sets)

A. Micro propagation
B. Differentiation
C. Somatic hybridization
D. Totipotency

Correct answer & explanation hidden

Log in to view solution →

Q121 BIOLOGY Unit 3: Cell Structure and Function

The lactose present in the growth medium of bacteria is transported to the cell by the action of:

A. Acetylase
B. Permease
C. Polymerase
D. Beta-galactosidase

Correct answer & explanation hidden

Log in to view solution →

Q122 BIOLOGY Unit 3: Cell Structure and Function

Spindle fibers attach to kinetochores of chromosomes during

↻ Repeated question — also appeared in 2024 (3 sets)

A. Metaphase
B. Anaphase
C. Telophase
D. Prophase

Correct answer & explanation hidden

Log in to view solution →

Q123 BIOLOGY Unit 2: Structural Organisation in Animals and Plants

Identify the part of the seed from the given figure which is destined to form root when the seed germinates.

↻ Repeated question — also appeared in 2024 (3 sets)

A. B
B. C
C. D
D. A

Correct answer & explanation hidden

Log in to view solution →

Q124 BIOLOGY Unit 7: Genetics and Evolution

A transcription unit in DNA is defined primarily by the three regions in DNA and these are with respect to upstream and down stream end:

↻ Repeated question — also appeared in 2024 (3 sets)

A. Structural gene, Transposons, Operator gene
B. Inducer, Repressor, Structural gene
C. Promotor, Structural gene, Terminator
D. Repressor, Operator gene, Structural gene

Correct answer & explanation hidden

Log in to view solution →

Q125 BIOLOGY Unit 4: Plant Physiology

How many molecules of ATP and NADPH are required for every molecule of CO2 fixed in the Calvin cycle?

↻ Repeated question — also appeared in 2024 (4 sets)

A. 2 molecules of ATP and 2 molecules of NADPH
B. 3 molecules of ATP and 3 molecules of NADPH
C. 3 molecules of ATP and 2 molecules of NADPH
D. 2 molecules of ATP and 3 molecules of NADPH

Correct answer & explanation hidden

Log in to view solution →

Q126 BIOLOGY Unit 2: Structural Organisation in Animals and Plants

Given below are two statements: Statement I : Parenchyma is living but collenchyma is dead tissue. Statement II: Gymnosperms lack xylem vessels but presence of xylem vessels is the characteristic of angiosperms. In the light of the above statements, choose the correct answer from the options given below:

↻ Repeated question — also appeared in 2024 (5 sets)

A. Both Statement I and Statement II are false
B. Statement I is true but Statement II is false
C. Statement I is false but Statement II is true
D. Both Statement I and Statement II are true

Correct answer & explanation hidden

Log in to view solution →

Q126 BIOLOGY Unit 2: Structural Organisation in Animals and Plants

Given below are two statements: Statement I : Parenchyma is living but collenchyma is dead tissue. Statement II: Gymnosperms lack xylem vessels but presence of xylem vessels is the characteristic of angiosperms. In the light of the above statements, choose the correct answer from the options given below:

↻ Repeated question — also appeared in 2024 (5 sets)

A. Both Statement I and Statement II are false
B. Statement I is true but Statement II is false
C. Statement I is false but Statement II is true
D. Both Statement I and Statement II are true

Correct answer & explanation hidden

Log in to view solution →

Q127 BIOLOGY Unit 4: Plant Physiology

Auxin is used by gardeners to prepare weed-free lawns. But no damage is caused to grass as auxin (1) promotes abscission of mature leaves only. (2) does not affect mature monocotyledonous plants. (3) can help in cell division in grasses, to produce growth. (4) promotes apical dominance.

A. promotes abscission of mature leaves only.
B. does not affect mature monocotyledonous plants.
C. can help in cell division in grasses, to produce growth.
D. promotes apical dominance.

Correct answer & explanation hidden

Log in to view solution →

Q127 BIOLOGY Unit 4: Plant Physiology

Auxin is used by gardeners to prepare weed-free lawns. But no damage is caused to grass as auxin

↻ Repeated question — also appeared in 2024 (4 sets)

A. promotes abscission of mature leaves only.
B. does not affect mature monocotyledonous plants.
C. can help in cell division in grasses, to produce growth.
D. promotes apical dominance.

Correct answer & explanation hidden

Log in to view solution →

Q128 BIOLOGY Unit 7: Genetics and Evolution

In a plant, black seed color (BB/Bb) is dominant over white seed color (bb). In order to find out the genotype of the black seed plant, with which of the following genotype will you cross it?

↻ Repeated question — also appeared in 2024 (5 sets)

A. bb
B. Bb
C. BB/Bb
D. BB

Correct answer & explanation hidden

Log in to view solution →

Q128 BIOLOGY Unit 7: Genetics and Evolution

In a plant, black seed color (BB/Bb) is dominant over white seed color (bb). In order to find out the genotype of the black seed plant, with which of the following genotype will you cross it?

↻ Repeated question — also appeared in 2024 (5 sets)

A. bb
B. Bb
C. BB/Bb
D. BB

Correct answer & explanation hidden

Log in to view solution →

Q129 BIOLOGY Unit 3: Cell Structure and Function

Inhibition of Succinic dehydrogenase enzyme by malonate is a classical example of:

↻ Repeated question — also appeared in 2024 (1 set)

A. Feedback inhibition
B. Competitive inhibition
C. Enzyme activation
D. Cofactor inhibition

Correct answer & explanation hidden

Log in to view solution →

Q130 BIOLOGY Unit 8: Biology and Human Welfare

Match List I with List II. List I: A. Clostridium butylicum, B. Saccharomyces cerevisiae, C. Trichoderma polysporum, D. Streptococcus sp. List II: I. Ethanol, II. Streptokinase, III. Butyric acid, IV. Cyclosporin-A.

↻ Repeated question — also appeared in 2024 (1 set)

A. A-II, B-IV, C-III, D-I
B. A-III, B-I, C-IV, D-II
C. A-IV, B-I, C-III, D-II
D. A-III, B-I, C-II, D-IV

Correct answer & explanation hidden

Log in to view solution →

Q130 BIOLOGY Unit 8: Biology and Human Welfare

↻ Repeated question — also appeared in 2024 (2 sets)

A. A-II, B-IV, C-III, D-I
B. A-III, B-I, C-IV, D-II
C. A-IV, B-I, C-III, D-II
D. A-III, B-I, C-II, D-IV

Correct answer & explanation hidden

Log in to view solution →

Q131 BIOLOGY Unit 10: Ecology and Environment

List of endangered species was released by-

↻ Repeated question — also appeared in 2024 (4 sets)

A. WWF
B. FOAM
C. IUCN
D. GEAC

Correct answer & explanation hidden

Log in to view solution →

Q131 BIOLOGY Unit 10: Ecology and Environment

List of endangered species was released by-

↻ Repeated question — also appeared in 2024 (4 sets)

A. WWF
B. FOAM
C. IUCN
D. GEAC

Correct answer & explanation hidden

Log in to view solution →

Q132 BIOLOGY Unit 3: Cell Structure and Function

Match List I with List II List I (Cell Organelle) | List II (Function/Characteristic) A. Nucleolus | I. Site of formation of glycolipid B. Centriole | II. Organization like the cartwheel C. Leucoplasts | III. Site for active ribosomal RNA synthesis D. Golgi apparatus | IV. For storing nutrients Choose the correct answer from the options given below:

↻ Repeated question — also appeared in 2024 (2 sets)

A. A-II, B-III, C-I, D-IV
B. A-III, B-IV, C-II, D-I
C. A-I, B-II, C-III, D-IV
D. A-III, B-II, C-IV, D-I

Correct answer & explanation hidden

Log in to view solution →

Q132 BIOLOGY Unit 3: Cell Structure and Function

↻ Repeated question — also appeared in 2024 (2 sets)

A. A-II, B-III, C-I, D-IV
B. A-III, B-IV, C-II, D-I
C. A-I, B-II, C-III, D-IV
D. A-III, B-II, C-IV, D-I

Correct answer & explanation hidden

Log in to view solution →

Q133 BIOLOGY Unit 1: Diversity in Living World

↻ Repeated question — also appeared in 2024 (3 sets)

A. A-I, B-III, C-II, D-IV
B. A-III, B-II, C-I, D-IV
C. A-IV, B-III, C-II, D-I
D. A-III, B-II, C-IV, D-I

Correct answer & explanation hidden

Log in to view solution →

Q133 BIOLOGY Unit 1: Diversity in Living World

A. A-I, B-III, C-II, D-IV
B. A-III, B-II, C-I, D-IV
C. A-IV, B-III, C-II, D-I
D. A-III, B-II, C-IV, D-I

Correct answer & explanation hidden

Log in to view solution →

Q134 BIOLOGY Unit 4: Plant Physiology

Identify the set of correct statements: A. The flowers of Vallisneria are colourful and produce nectar. B. The flowers of waterlily are not pollinated by water. C. In most of water-pollinated species, the pollen grains are protected from wetting. D. Pollen grains of some hydrophytes are long and ribbon like. E. In some hydrophytes, the pollen grains are carried passively inside water.

↻ Repeated question — also appeared in 2024 (2 sets)

A. A, B, C and D only
B. A, C, D and E only
C. B, C, D and E only
D. C, D and E only

Correct answer & explanation hidden

Log in to view solution →

Q135 BIOLOGY Unit 2: Structural Organisation in Animals and Plants

Bulliform cells are responsible for

↻ Repeated question — also appeared in 2024 (5 sets)

A. Protecting the plant from salt stress.
B. Increased photosynthesis in monocots.
C. Providing large spaces for storage of sugars.
D. Inward curling of leaves in monocots.

Correct answer & explanation hidden

Log in to view solution →

Q135 BIOLOGY Unit 2: Structural Organisation in Animals and Plants

Bulliform cells are responsible for:

↻ Repeated question — also appeared in 2024 (5 sets)

A. Protecting the plant from salt stress.
B. Increased photosynthesis in monocots.
C. Providing large spaces for storage of sugars.
D. Inward curling of leaves in monocots.

Correct answer & explanation hidden

Log in to view solution →

Q136 BIOLOGY Unit 2: Structural Organisation in Animals and Plants

↻ Repeated question — also appeared in 2024 (3 sets)

A. A-IV, B-I, C-II, D-III
B. A-I, B-II, C-IV, D-III
C. A-III, B-I, C-IV, D-II
D. A-IV, B-II, C-I, D-III

Correct answer & explanation hidden

Log in to view solution →

Q137 BIOLOGY Unit 4: Plant Physiology

Identify the step in tricarboxylic acid cycle, which does not involve oxidation of substrate.

↻ Repeated question — also appeared in 2024 (3 sets)

A. Succinic acid -> Malic acid
B. Succinyl-CoA -> Succinic acid
C. Isocitrate -> a-ketoglutaric acid
D. Malic acid -> Oxaloacetic acid

Correct answer & explanation hidden

Log in to view solution →

Q138 BIOLOGY Unit 3: Cell Structure and Function

The DNA present in chloroplast is:

↻ Repeated question — also appeared in 2024 (3 sets)

A. Circular, double stranded
B. Linear, single stranded
C. Circular, single stranded
D. Linear, double stranded

Correct answer & explanation hidden

Log in to view solution →

Q139 BIOLOGY Unit 7: Genetics and Evolution

Match List I with List II List I | List II A. Frederick Griffith | I. Genetic code B. Francois Jacob & Jacque Monod | II. Semi-conservative mode of DNA replication C. Har Gobind Khorana | III. Transformation D. Meselson & Stahl | IV. Lac operon Choose the correct answer from the options given below:

↻ Repeated question — also appeared in 2024 (2 sets)

A. A-III, B-IV, C-I, D-II
B. A-II, B-III, C-IV, D-I
C. A-IV, B-I, C-II, D-III
D. A-III, B-II, C-I, D-IV

Correct answer & explanation hidden

Log in to view solution →

Q140 BIOLOGY Unit 9: Biotechnology and Its Applications

Which of the following are fused in somatic hybridization involving two varieties of plants?

↻ Repeated question — also appeared in 2024 (3 sets)

A. Somatic embryos
B. Protoplasts
C. Pollens
D. Callus

Correct answer & explanation hidden

Log in to view solution →

Q140 BIOLOGY Unit 8: Biology and Human Welfare

Which of the following are fused in somatic hybridization involving two varieties of plants?

A. Somatic embryos
B. Protoplasts
C. Pollens
D. Callus

Correct answer & explanation hidden

Log in to view solution →

Q141 BIOLOGY Unit 4: Plant Physiology

Identify the correct description about the given figure:

↻ Repeated question — also appeared in 2024 (1 set)

A. Water pollinated flowers showing stamens with mucilaginous covering.
B. Cleistogamous flowers showing autogamy.
C. Compact inflorescence showing complete autogamy.
D. Wind pollinated plant inflorescence showing flowers with well exposed stamens.

Correct answer & explanation hidden

Log in to view solution →

Q142 BIOLOGY Unit 4: Plant Physiology

Given below are two statements: Statement I : In C3 plants, some O2 binds to RuBisCO, hence CO2 fixation is decreased. Statement II: In C4 plants, mesophyll cells show very little photorespiration while bundle sheath cells do not show photorespiration. In the light of the above statements, choose the correct answer from the options given below:

↻ Repeated question — also appeared in 2024 (4 sets)

A. Both Statement I and Statement II are false
B. Statement I is true but Statement II is false
C. Statement I is false but Statement II is true
D. Both Statement I and Statement II are true

Correct answer & explanation hidden

Log in to view solution →