Q1
PHYSICS
Unit 12: Current Electricity
A carbon resistor of (47 ± 4.7) kΩ is to be marked with rings of different colours for its identification. The colour code sequence will be
↻ Repeated question — also appeared in
2018 (13 sets)
- A. Violet – Yellow – Orange – Silver
- B. Yellow – Violet – Orange – Silver
- C. Yellow – Green – Violet – Gold
- D. Green – Orange – Violet – Gold
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Q2
PHYSICS
Unit 12: Current Electricity
A battery consists of a variable number n of identical cells (having internal resistance r each) which are connected in series. The terminals of the battery are short-circuited and the current I is measured. Which of the graphs shows the correct relationship between I and n?
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2018 (3 sets)
- A. A graph of I versus n that is a straight line through the origin
- B. A graph of I versus n that is a rectangular hyperbola
- C. A graph of I versus n that is a parabola opening upward
- D. A graph of I versus n that is independent of n
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Q3
PHYSICS
Unit 12: Current Electricity
A set of n equal resistors, of value R each, are connected in series to a battery of emf E and internal resistance R. The current drawn is I. Now, the n resistors are connected in parallel to the same battery. Then the current drawn from battery becomes 10I. The value of n is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 10
- B. 11
- C. 20
- D. 9
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Q4
PHYSICS
Unit 11: Electrostatics
An electron falls from rest through a vertical distance h in a uniform and vertically upward directed electric field E. The direction of electric field is now reversed, keeping its magnitude the same. A proton is allowed to fall from rest in it through the same vertical distance h. The time of fall of the electron, in comparison to the time of fall of the proton is
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2018 (14 sets)
- A. smaller
- B. 5 times greater
- C. 10 times greater
- D. equal
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Q5
PHYSICS
Unit 10: Oscillations and Waves
A tuning fork is used to produce resonance in a glass tube. The length of the air column in this tube can be adjusted by a variable piston. At room temperature of 27 °C two successive resonances are produced at 20 cm and 73 cm of column length. If the frequency of the tuning fork is 320 Hz, the velocity of sound in air at 27 °C is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 330 m/s
- B. 339 m/s
- C. 350 m/s
- D. 300 m/s
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Q5
PHYSICS
Unit 10: Oscillations and Waves
A tuning fork is used to produce resonance in a glass tube. The length of the air column in this tube can be adjusted by a variable piston. At room temperature of 27°C, two successive resonances are produced at 20 cm and 73 cm of column length. If the frequency of the tuning fork is 320 Hz, the velocity of sound in air at 27°C is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 330 m/s
- B. 339 m/s
- C. 350 m/s
- D. 300 m/s
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Q6
PHYSICS
Unit 10: Oscillations and Waves
A pendulum is hung from the roof of a sufficiently high building and is moving freely to and fro like a simple harmonic oscillator. The acceleration of the bob of the pendulum is 20 m/s² at a distance of 5 m from the mean position. The time period of oscillation is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. 2π s
- B. π s
- C. 2 s
- D. 1 s
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Q6
PHYSICS
Unit 10: Oscillations and Waves
A pendulum is hung from the roof of a sufficiently high building and is moving freely to and fro like a simple harmonic oscillator. The acceleration of the bob of the pendulum is 20 m/s² at a distance of 5 m from the mean position. The time period of oscillation is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. 2π s
- B. π s
- C. 2 s
- D. 1 s
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Q7
PHYSICS
Unit 11: Electrostatics
The electrostatic force between the metal plates of an isolated parallel plate capacitor C having a charge Q and area A, is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. independent of the distance between the plates.
- B. linearly proportional to the distance between the plates.
- C. proportional to the square root of the distance between the plates.
- D. inversely proportional to the distance between the plates.
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Q7
PHYSICS
Unit 11: Electrostatics
The electrostatic force between the metal plates of an isolated parallel plate capacitor having charge Q and area A is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. independent of the distance between the plates.
- B. linearly proportional to the distance between the plates.
- C. proportional to the square root of the distance between the plates.
- D. inversely proportional to the distance between the plates.
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Q8
PHYSICS
Unit 17: Dual Nature of Matter and Radiation
An electron of mass m with an initial velocity V = V₀ î (V₀ > 0) enters an electric field E = −E₀ î (E₀ = constant > 0) at t = 0. If λ₀ is its de-Broglie wavelength initially, then its de-Broglie wavelength at time t is
↻ Repeated question — also appeared in
2018 (11 sets)
- A. λ₀ / (1 + eE₀t / (mV₀))
- B. λ₀ (1 + eE₀t / (mV₀))
- C. λ₀ t
- D. λ₀
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Q9
PHYSICS
Unit 17: Dual Nature of Matter and Radiation
When light of frequency 2ν₀ (where ν₀ is threshold frequency) is incident on a metal plate, the maximum velocity of electrons emitted is v₁. When the frequency of the incident radiation is increased to 5ν₀, the maximum velocity of electrons emitted from the same plate is v₂. The ratio v₁ to v₂ is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 1 : 2
- B. 1 : 4
- C. 4 : 1
- D. 2 : 1
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Q10
PHYSICS
Unit 18: Atoms and Nuclei
For a radioactive material, half-life is 10 minutes. If initially there are 600 nuclei, the time taken (in minutes) for the disintegration of 450 nuclei is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 20
- B. 10
- C. 30
- D. 15
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Q11
PHYSICS
Unit 18: Atoms and Nuclei
The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 1 : 1
- B. 1 : −1
- C. 2 : −1
- D. 1 : −2
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Q14
PHYSICS
Unit 19: Electronic Devices
In a p-n junction diode, change in temperature due to heating
↻ Repeated question — also appeared in
2018 (15 sets)
- A. affects only reverse resistance
- B. affects only forward resistance
- C. does not affect resistance of p-n junction
- D. affects the overall V-I characteristics of p-n junction
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Q15
PHYSICS
Unit 4: Work Energy and Power
A body initially at rest and sliding along a frictionless track from a height h (as shown in the figure) just completes a vertical circle of diameter AB = D. The height h is equal to
↻ Repeated question — also appeared in
2018 (11 sets)
- A. 3D/2
- B. D
- C. 5D/7
- D. 4D/5
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Q16
PHYSICS
Unit 5: Rotational Motion
Three objects, A: a solid sphere, B: a thin circular disk and C: a circular ring, each have the same mass M and radius R. They all spin with the same angular speed ω about their own symmetry axes. The amounts of work (W) required to bring them to rest would satisfy the relation
↻ Repeated question — also appeared in
2018 (15 sets)
- A. WC > WB > WA
- B. WA > WB > WC
- C. WB > WA > WC
- D. WA > WC > WB
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Q17
PHYSICS
Unit 3: Laws of Motion
A moving block having mass m collides with another stationary block having mass 4m. The lighter block comes to rest after collision. When the initial velocity of the lighter block is v, then the value of coefficient of restitution e will be
↻ Repeated question — also appeared in
2018 (10 sets)
- A. 0.5
- B. 0.25
- C. 0.8
- D. 0.4
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Q18
PHYSICS
Unit 3: Laws of Motion
Which one of the following statements is incorrect?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Rolling friction is smaller than sliding friction.
- B. Limiting value of static friction is directly proportional to normal reaction.
- C. Frictional force opposes the relative motion.
- D. Coefficient of sliding friction has dimensions of length.
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Q18
PHYSICS
Unit 3: Laws of Motion
Which one of the following statements is incorrect?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Rolling friction is smaller than sliding friction.
- B. Limiting value of static friction is directly proportional to normal reaction.
- C. Frictional force opposes the relative motion.
- D. Coefficient of sliding friction has dimensions of length.
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Q19
PHYSICS
Unit 5: Rotational Motion
The moment of the force F = 4î + 5ĵ − 6k̂ at (2, 0, −3), about the point (2, −2, −2), is given by
↻ Repeated question — also appeared in
2018 (14 sets)
- A. −8î − 4ĵ − 7k̂
- B. −4î − ĵ − 8k̂
- C. −7î − 8ĵ − 4k̂
- D. −7î − 4ĵ − 8k̂
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Q19
PHYSICS
Unit 5: Rotational Motion
The moment of the force F = 4i + 5j - 6k at the point (2, 0, -3), about the point (2, -2, -2), is given by
↻ Repeated question — also appeared in
2018 (14 sets)
- A. -8i - 4j - 7k
- B. -4i - j - 8k
- C. -7i - 8j - 4k
- D. -7i - 4j - 8k
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Q20
PHYSICS
Unit 2: Kinematics
A toy car with charge q moves on a frictionless horizontal plane surface under the influence of a uniform electric field E. Due to the force qE, its velocity increases from 0 to 6 m/s in one second duration. At that instant the direction of the field is reversed. The car continues to move for two more seconds under the influence of this field. The average velocity and the average speed of the toy car between 0 to 3 seconds are respectively
↻ Repeated question — also appeared in
2018 (13 sets)
- A. 2 m/s, 4 m/s
- B. 1 m/s, 3 m/s
- C. 1 m/s, 3.5 m/s
- D. 1.5 m/s, 3 m/s
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Q21
PHYSICS
Unit 20: Experimental Skills
A student measured the diameter of a small steel ball using a screw gauge of least count 0.001 cm. The main scale reading is 5 mm and zero of circular scale division coincides with 25 divisions above the reference level. If the screw gauge has a zero error of -0.004 cm, the correct diameter of the ball is
↻ Repeated question — also appeared in
2018 (8 sets)
- A. 0.521 cm
- B. 0.525 cm
- C. 0.053 cm
- D. 0.529 cm
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Q22
PHYSICS
Unit 3: Laws of Motion
A block of mass m is placed on a smooth inclined wedge ABC of inclination θ as shown in the figure. The wedge is given an acceleration a towards the right. The relation between a and θ for the block to remain stationary on the wedge is
↻ Repeated question — also appeared in
2018 (11 sets)
- A. a = g cos θ
- B. a = g sin θ
- C. a = g cos θ
- D. a = g tan θ
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Q24
PHYSICS
Unit 10: Oscillations and Waves
The fundamental frequency in an open organ pipe is equal to the third harmonic of a closed organ pipe. If the length of the closed organ pipe is 20 cm, the length of the open organ pipe is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 13.2 cm
- B. 8 cm
- C. 12.5 cm
- D. 16 cm
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Q25
PHYSICS
Unit 9: Kinetic Theory of Gases
At what temperature will the rms speed of oxygen molecules become just sufficient for escaping from the Earth's atmosphere? Given: Mass of oxygen molecule m = 2.76 × 10^-26 kg; Boltzmann's constant kB = 1.38 × 10^-23 J K^-1
↻ Repeated question — also appeared in
2018 (13 sets)
- A. 2.508 × 10^4 K
- B. 8.360 × 10^4 K
- C. 5.016 × 10^4 K
- D. 1.254 × 10^4 K
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Q26
PHYSICS
Unit 8: Thermodynamics
The efficiency of an ideal heat engine working between the freezing point and boiling point of water, is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 26.8%
- B. 20%
- C. 6.25%
- D. 12.5%
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Q27
PHYSICS
Unit 16: Optics
Unpolarised light is incident from air on a plane surface of a material of refractive index μ. At a particular angle of incidence i, it is found that the reflected and refracted rays are perpendicular to each other. Which of the following options is correct for this situation?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Reflected light is polarised with its electric vector parallel to the plane of incidence
- B. Reflected light is polarised with its electric vector perpendicular to the plane of incidence
- C. i = sin^-1(1/μ)
- D. i = tan^-1(1/μ)
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Q28
PHYSICS
Unit 16: Optics
In Young's double slit experiment the separation d between the slits is 2 mm, the wavelength λ of the light used is 5896 Å and distance D between the screen and slits is 100 cm. It is found that the angular width of the fringes is 0.20°. To increase the fringe angular width to 0.21° (with same λ and D) the separation between the slits needs to be changed to
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 1.8 mm
- B. 1.9 mm
- C. 2.1 mm
- D. 1.7 mm
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Q29
PHYSICS
Unit 16: Optics
An astronomical refracting telescope will have large angular magnification and high angular resolution, when it has an objective lens of
↻ Repeated question — also appeared in
2018 (16 sets)
- A. small focal length and large diameter
- B. large focal length and small diameter
- C. large focal length and large diameter
- D. small focal length and small diameter
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Q29
PHYSICS
Unit 16: Optics
An astronomical refracting telescope will have large angular magnification and high angular resolution when it has an objective lens of
↻ Repeated question — also appeared in
2018 (16 sets)
- A. small focal length and large diameter
- B. large focal length and small diameter
- C. large focal length and large diameter
- D. small focal length and small diameter
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Q30
PHYSICS
Unit 15: Electromagnetic Waves
An em wave is propagating in a medium with a velocity V = V i. The instantaneous oscillating electric field of this em wave is along +y axis. Then the direction of oscillating magnetic field of the em wave will be along
↻ Repeated question — also appeared in
2018 (16 sets)
- A. -z direction
- B. +z direction
- C. -y direction
- D. -x direction
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Q30
PHYSICS
Unit 15: Electromagnetic Waves
An em wave is propagating in a medium with velocity V = V i-hat. The instantaneous oscillating electric field of this em wave is along the +y axis. Then the direction of oscillating magnetic field of the em wave will be along
↻ Repeated question — also appeared in
2018 (16 sets)
- A. −z direction
- B. +z direction
- C. −y direction
- D. −x direction
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Q31
PHYSICS
Unit 16: Optics
The refractive index of the material of a prism is 2 and the angle of the prism is 30°. One of the two refracting surfaces of the prism is made a mirror inwards, by silver coating. A beam of monochromatic light entering the prism from the other face will retrace its path (after reflection from the silvered surface) if its angle of incidence on the prism is
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 60°
- B. 45°
- C. 30°
- D. 0°
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Q32
PHYSICS
Unit 16: Optics
An object is placed at a distance of 40 cm from a concave mirror of focal length 15 cm. If the object is displaced through a distance of 20 cm towards the mirror, the displacement of the image will be
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 30 cm away from the mirror
- B. 36 cm away from the mirror
- C. 30 cm towards the mirror
- D. 36 cm towards the mirror
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Q33
PHYSICS
Unit 4: Work Energy and Power
The magnetic potential energy stored in a certain inductor is 25 mJ, when the current in the inductor is 60 mA. This inductor is of inductance
↻ Repeated question — also appeared in
2018 (2 sets)
- A. 0.138 H
- B. 138.88 H
- C. 1.389 H
- D. 13.89 H
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Q34
PHYSICS
Unit 12: Current Electricity
Current sensitivity of a moving coil galvanometer is 5 div/mA and its voltage sensitivity (angular deflection per unit voltage applied) is 20 div/V. The resistance of the galvanometer is
↻ Repeated question — also appeared in
2018 (10 sets)
- A. 40 Ω
- B. 25 Ω
- C. 250 Ω
- D. 500 Ω
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Q35
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
A metallic rod of mass per unit length 0.5 kg m^-1 is lying horizontally on a smooth inclined plane which makes an angle of 30° with the horizontal. The rod is not allowed to slide down by flowing a current through it when a magnetic field of induction 0.25 T is acting on it in the vertical direction. The current flowing in the rod to keep it stationary is
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 7.14 A
- B. 5.98 A
- C. 14.76 A
- D. 11.32 A
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Q36
PHYSICS
Unit 14: Electromagnetic Induction and Alternating Currents
An inductor 20 mH, a capacitor 100 μF and a resistor 50 Ω are connected in series across a source of emf, V = 10 sin 314 t. The power loss in the circuit is
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 0.79 W
- B. 0.43 W
- C. 2.74 W
- D. 1.13 W
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Q37
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
A thin diamagnetic rod is placed vertically between the poles of an electromagnet. When the current in the electromagnet is switched on, then the diamagnetic rod is pushed up, out of the horizontal magnetic field. Hence the rod gains gravitational potential energy. The work required to do this comes from
↻ Repeated question — also appeared in
2018 (14 sets)
- A. the current source
- B. the magnetic field
- C. the lattice structure of the material of the rod
- D. the induced electric field due to the changing magnetic field
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Q38
PHYSICS
Unit 7: Properties of Solids and Liquids
A small sphere of radius r falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of production of heat when the sphere attains its terminal velocity, is proportional to
↻ Repeated question — also appeared in
2018 (15 sets)
- A. r^3
- B. r^2
- C. r^5
- D. r^4
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Q39
PHYSICS
Unit 8: Thermodynamics
The power radiated by a black body is P and it radiates maximum energy at wavelength λ0. If the temperature of the black body is now changed so that it radiates maximum energy at wavelength (4/3) λ0, the power radiated by it becomes nP. The value of n is
↻ Repeated question — also appeared in
2018 (12 sets)
- A. 4/3
- B. 3/4
- C. 81/256
- D. 256/81
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Q40
PHYSICS
Unit 8: Thermodynamics
A sample of 0.1 g of water at 100°C and normal pressure (1.013 × 10^5 N m^-2) requires 54 cal of heat energy to convert to steam at 100°C. If the volume of the steam produced is 167.1 cc, the change in internal energy of the sample is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 104.3 J
- B. 208.7 J
- C. 42.2 J
- D. 84.5 J
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Q41
PHYSICS
Unit 7: Properties of Solids and Liquids
Two wires are made of the same material and have the same volume. The first wire has cross-sectional area A and the second wire has cross-sectional area 3A. If the length of the first wire is increased by Δl on applying a force F, how much force is needed to stretch the second wire by the same amount?
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 9F
- B. 6F
- C. 4F
- D. F
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Q41
PHYSICS
Unit 5: Rotational Motion
Two wires are made of the same material and have the same volume. The first wire has cross-sectional area A and the second wire has cross-sectional area 3A. If the length of the first wire is increased by Δl on applying a force F, how much force is needed to stretch the second wire by the same amount?
- A. 9 F
- B. 6 F
- C. 4 F
- D. F
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Q42
PHYSICS
Unit 5: Rotational Motion
A solid sphere is rotating freely about its symmetry axis in free space. The radius of the sphere is increased keeping its mass same. Which of the following physical quantities would remain constant for the sphere?
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2018 (16 sets)
- A. Angular velocity
- B. Moment of inertia
- C. Rotational kinetic energy
- D. Angular momentum
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Q42
PHYSICS
Unit 5: Rotational Motion
A solid sphere is rotating freely about its symmetry axis in free space. The radius of the sphere is increased keeping its mass same. Which of the following physical quantities would remain constant for the sphere?
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Angular velocity
- B. Moment of inertia
- C. Rotational kinetic energy
- D. Angular momentum
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Q43
PHYSICS
Unit 6: Gravitation
The kinetic energies of a planet in an elliptical orbit about the Sun, at positions A, B and C are K_A, K_B and K_C, respectively. AC is the major axis and SB is perpendicular to AC at the position of the Sun S as shown in the figure. Then
↻ Repeated question — also appeared in
2018 (10 sets)
- A. K_A < K_B < K_C
- B. K_A > K_B > K_C
- C. K_B < K_A < K_C
- D. K_B > K_A > K_C
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Q44
PHYSICS
Unit 5: Rotational Motion
A solid sphere is in rolling motion. In rolling motion a body possesses translational kinetic energy (K_t) as well as rotational kinetic energy (K_r) simultaneously. The ratio K_t : (K_t + K_r) for the sphere is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 7 : 10
- B. 5 : 7
- C. 10 : 7
- D. 2 : 5
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Q45
PHYSICS
Unit 6: Gravitation
If the mass of the Sun were ten times smaller and the universal gravitational constant were ten times larger in magnitude, which of the following is not correct?
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2018 (13 sets)
- A. Raindrops will fall faster.
- B. Walking on the ground would become more difficult.
- C. Time period of a simple pendulum on the Earth would decrease.
- D. g on the Earth will not change.
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Q46
BIOLOGY
Unit 5: Human Physiology
Which of the following is an amino acid derived hormone?
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2018 (15 sets)
- A. Epinephrine
- B. Ecdysone
- C. Estradiol
- D. Estriol
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Q47
BIOLOGY
Unit 5: Human Physiology
Which of the following structures or regions is incorrectly paired with its function?
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2018 (13 sets)
- A. Medulla oblongata: controls respiration and cardiovascular reflexes.
- B. Limbic system: consists of fibre tracts that interconnect different regions of brain; controls movement.
- C. Hypothalamus: production of releasing hormones and regulation of temperature, hunger and thirst.
- D. Corpus callosum: band of fibers connecting left and right cerebral hemispheres.
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Q48
BIOLOGY
Unit 5: Human Physiology
The transparent lens in the human eye is held in its place by
↻ Repeated question — also appeared in
2018 (15 sets)
- A. ligaments attached to the ciliary body
- B. ligaments attached to the iris
- C. smooth muscles attached to the iris
- D. smooth muscles attached to the ciliary body
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Q49
BIOLOGY
Unit 5: Human Physiology
Which of the following hormones can play a significant role in osteoporosis?
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2018 (15 sets)
- A. Aldosterone and Prolactin
- B. Progesterone and Aldosterone
- C. Estrogen and Parathyroid hormone
- D. Parathyroid hormone and Prolactin
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Q50
BIOLOGY
Unit 1: Diversity in Living World
Ciliates differ from all other protozoans in
↻ Repeated question — also appeared in
2018 (14 sets)
- A. using flagella for locomotion
- B. having a contractile vacuole for removing excess water
- C. using pseudopodia for capturing prey
- D. having two types of nuclei
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Q51
BIOLOGY
Unit 1: Diversity in Living World
Identify the vertebrate group of animals characterized by crop and gizzard in its digestive system.
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2018 (9 sets)
- A. Amphibia
- B. Reptilia
- C. Aves
- D. Osteichthyes
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Q52
BIOLOGY
Unit 10: Ecology and Environment
Which of the following organisms are known as chief producers in the oceans?
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2018 (4 sets)
- A. Dinoflagellates
- B. Diatoms
- C. Cyanobacteria
- D. Euglenoids
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Q53
BIOLOGY
Unit 1: Diversity in Living World
Which one of these animals is not a homeotherm?
↻ Repeated question — also appeared in
2018 (7 sets)
- A. Macropus
- B. Chelone
- C. Camelus
- D. Psittacula
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Q54
BIOLOGY
Unit 1: Diversity in Living World
Which of the following animals does not undergo metamorphosis?
↻ Repeated question — also appeared in
2018 (8 sets)
- A. Earthworm
- B. Tunicate
- C. Moth
- D. Starfish
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Q55
BIOLOGY
Unit 1: Diversity in Living World
Which of the following features is used to identify a male cockroach from a female cockroach?
↻ Repeated question — also appeared in
2018 (4 sets)
- A. Presence of a boat shaped sternum on the 9th abdominal segment
- B. Presence of caudal styles
- C. Forewings with darker tegmina
- D. Presence of anal cerci
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Q55
BIOLOGY
Unit 1: Diversity in Living World
Which of the following features is used to identify a male cockroach from a female cockroach?
↻ Repeated question — also appeared in
2018 (4 sets)
- A. Presence of a boat-shaped sternum on the 9th abdominal segment
- B. Presence of caudal styles
- C. Forewings with darker tegmina
- D. Presence of anal cerci
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Q56
BIOLOGY
Unit 5: Human Physiology
Which one of the following population interactions is widely used in medical science for the production of antibiotics?
- A. Commensalism
- B. Mutualism
- C. Parasitism
- D. Amensalism
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Q56
BIOLOGY
Unit 8: Biology and Human Welfare
Which one of the following population interactions is widely used in medical science for the production of antibiotics?
↻ Repeated question — also appeared in
2018 (3 sets)
- A. Commensalism
- B. Mutualism
- C. Parasitism
- D. Amensalism
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Q57
BIOLOGY
Unit 10: Ecology and Environment
All of the following are included in ex-situ conservation except
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Wildlife safari parks
- B. Sacred groves
- C. Botanical gardens
- D. Seed banks
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Q57
BIOLOGY
Unit 10: Ecology and Environment
All of the following are included in Ex-situ conservation except
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Wildlife safari parks
- B. Sacred groves
- C. Botanical gardens
- D. Seed banks
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Q58
BIOLOGY
Unit 10: Ecology and Environment
Match the items given in Column I with those in Column II and select the correct option given below:
Column I: a. Eutrophication, b. Sanitary landfill, c. Snow blindness, d. Jhum cultivation
Column II: i. UV-B radiation, ii. Deforestation, iii. Nutrient enrichment, iv. Waste disposal
↻ Repeated question — also appeared in
2018 (12 sets)
- A. a-ii, b-i, c-iii, d-iv
- B. a-i, b-iii, c-iv, d-ii
- C. a-iii, b-iv, c-i, d-ii
- D. a-i, b-ii, c-iv, d-iii
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Q58
BIOLOGY
Unit 10: Ecology and Environment
Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Eutrophication
b. Sanitary landfill
c. Snow blindness
d. Jhum cultivation
Column II
i. UV-B radiation
ii. Deforestation
iii. Nutrient enrichment
iv. Waste disposal
↻ Repeated question — also appeared in
2018 (12 sets)
- A. a-ii, b-i, c-iii, d-iv
- B. a-i, b-iii, c-iv, d-ii
- C. a-iii, b-iv, c-i, d-ii
- D. a-i, b-ii, c-iv, d-iii
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Q59
BIOLOGY
Unit 10: Ecology and Environment
In a growing population of a country,
↻ Repeated question — also appeared in
2018 (15 sets)
- A. pre-reproductive individuals are more than the reproductive individuals.
- B. reproductive individuals are less than the post-reproductive individuals.
- C. reproductive and pre-reproductive individuals are equal in number.
- D. pre-reproductive individuals are less than the reproductive individuals.
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Q60
BIOLOGY
Unit 8: Biology and Human Welfare
Which part of poppy plant is used to obtain the drug Smack?
↻ Repeated question — also appeared in
2018 (13 sets)
- A. Flowers
- B. Latex
- C. Roots
- D. Leaves
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Q61
BIOLOGY
Unit 6: Reproduction
Hormones secreted by the placenta to maintain pregnancy are
↻ Repeated question — also appeared in
2018 (13 sets)
- A. hCG, hPL, progestogens, prolactin
- B. hCG, hPL, estrogens, relaxin, oxytocin
- C. hCG, hPL, progestogens, estrogens
- D. hCG, progestogens, estrogens, glucocorticoids
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Q62
BIOLOGY
Unit 6: Reproduction
The contraceptive Saheli
↻ Repeated question — also appeared in
2018 (12 sets)
- A. blocks estrogen receptors in the uterus, preventing eggs from getting implanted.
- B. increases the concentration of estrogen and prevents ovulation in females.
- C. is an IUD.
- D. is a post-coital contraceptive.
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Q63
BIOLOGY
Unit 6: Reproduction
The amnion of mammalian embryo is derived from
↻ Repeated question — also appeared in
2018 (14 sets)
- A. ectoderm and mesoderm
- B. endoderm and mesoderm
- C. mesoderm and trophoblast
- D. ectoderm and endoderm
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Q64
BIOLOGY
Unit 6: Reproduction
The difference between spermiogenesis and spermiation is
↻ Repeated question — also appeared in
2018 (14 sets)
- A. In spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed.
- B. In spermiogenesis spermatozoa are formed, while in spermiation spermatids are formed.
- C. In spermiogenesis spermatozoa from Sertoli cells are released into the cavity of seminiferous tubules, while in spermiation spermatozoa are formed.
- D. In spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from Sertoli cells into the cavity of seminiferous tubules.
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Q65
BIOLOGY
Unit 5: Human Physiology
Which of the following options correctly represents the lung conditions in asthma and emphysema, respectively?
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Inflammation of bronchioles; Decreased respiratory surface
- B. Increased number of bronchioles; Increased respiratory surface
- C. Increased respiratory surface; Inflammation of bronchioles
- D. Decreased respiratory surface; Inflammation of bronchioles
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Q66
BIOLOGY
Unit 5: Human Physiology
Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Tricuspid valve
b. Bicuspid valve
c. Semilunar valve
Column II
i. Between left atrium and left ventricle
ii. Between right ventricle and pulmonary artery
iii. Between right atrium and right ventricle
↻ Repeated question — also appeared in
2018 (10 sets)
- A. a-iii, b-i, c-ii
- B. a-i, b-iii, c-ii
- C. a-i, b-ii, c-iii
- D. a-ii, b-i, c-iii
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Q67
BIOLOGY
Unit 5: Human Physiology
Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Tidal volume
b. Inspiratory reserve volume
c. Expiratory reserve volume
d. Residual volume
Column II
i. 2500–3000 mL
ii. 1100–1200 mL
iii. 500–550 mL
iv. 1000–1100 mL
↻ Repeated question — also appeared in
2018 (10 sets)
- A. a-iii, b-ii, c-i, d-iv
- B. a-iii, b-i, c-iv, d-ii
- C. a-i, b-iv, c-ii, d-iii
- D. a-iv, b-iii, c-ii, d-i
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Q68
BIOLOGY
Unit 5: Human Physiology
Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Glycosuria
b. Gout
c. Renal calculi
d. Glomerular nephritis
Column II
i. Accumulation of uric acid in joints
ii. Mass of crystallised salts within the kidney
iii. Inflammation in glomeruli
iv. Presence of glucose in urine
↻ Repeated question — also appeared in
2018 (10 sets)
- A. a-iv, b-i, c-ii, d-iii
- B. a-i, b-ii, c-iii, d-iv
- C. a-ii, b-iii, c-i, d-iv
- D. a-iii, b-iv, c-ii, d-i
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Q68
BIOLOGY
Unit 5: Human Physiology
Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Glycosuria
b. Gout
c. Renal calculi
d. Glomerular nephritis
Column II
i. Accumulation of uric acid in joints
ii. Mass of crystallised salts within the kidney
iii. Inflammation in glomeruli
iv. Presence of glucose in urine
↻ Repeated question — also appeared in
2018 (10 sets)
- A. a b c d = iii ii iv i
- B. a b c d = i ii iii iv
- C. a b c d = ii iii i iv
- D. a b c d = iv i ii iii
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Q69
BIOLOGY
Unit 5: Human Physiology
Match the items given in Column I with those in Column II and select the correct option given below:
Column I (Function)
a. Ultrafiltration
b. Concentration of urine
c. Transport of urine
d. Storage of urine
Column II (Part of Excretory System)
i. Henle’s loop
ii. Ureter
iii. Urinary bladder
iv. Malpighian corpuscle
v. Proximal convoluted tubule
↻ Repeated question — also appeared in
2018 (9 sets)
- A. a-iv, b-i, c-ii, d-iii
- B. a-iv, b-v, c-ii, d-iii
- C. a-v, b-iv, c-i, d-ii
- D. a-v, b-iv, c-i, d-iii
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Q69
BIOLOGY
Unit 5: Human Physiology
Match the items given in Column I with those in Column II and select the correct option given below:
Column I (Function)
a. Ultrafiltration
b. Concentration of urine
c. Transport of urine
d. Storage of urine
Column II (Part of Excretory System)
i. Henle’s loop
ii. Ureter
iii. Urinary bladder
iv. Malpighian corpuscle
v. Proximal convoluted tubule
↻ Repeated question — also appeared in
2018 (9 sets)
- A. a b c d = iv v ii iii
- B. a b c d = iv i ii iii
- C. a b c d = v iv i ii
- D. a b c d = v iv i iii
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Q70
BIOLOGY
Unit 4: Plant Physiology
Which of the following events does not occur in rough endoplasmic reticulum?
- A. Protein folding
- B. Protein glycosylation
- C. Cleavage of signal peptide
- D. Phospholipid synthesis
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Q71
BIOLOGY
Unit 4: Plant Physiology
Which of these statements is incorrect?
↻ Repeated question — also appeared in
2018 (11 sets)
- A. Enzymes of TCA cycle are present in mitochondrial matrix.
- B. Glycolysis occurs in cytosol.
- C. Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms.
- D. Oxidative phosphorylation takes place in outer mitochondrial membrane.
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Q72
BIOLOGY
Unit 5: Human Physiology
Nissl bodies are mainly composed of
↻ Repeated question — also appeared in
2018 (4 sets)
- A. Proteins and lipids
- B. DNA and RNA
- C. Nucleic acids and SER
- D. Free ribosomes and RER
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Q73
BIOLOGY
Unit 5: Human Physiology
Which of the following terms describe human dentition?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Thecodont, Diphyodont, Homodont
- B. Thecodont, Diphyodont, Heterodont
- C. Pleurodont, Monophyodont, Homodont
- D. Pleurodont, Diphyodont, Heterodont
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Q74
BIOLOGY
Unit 3: Cell Structure and Function
Select the incorrect match:
↻ Repeated question — also appeared in
2018 (11 sets)
- A. Lampbrush – Diplotene bivalents chromosomes
- B. Allosomes – Sex chromosomes
- C. Submetacentric – L-shaped chromosomes
- D. Polytene chromosomes – Oocytes of amphibians
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Q75
BIOLOGY
Unit 3: Cell Structure and Function
Many ribosomes may associate with a single mRNA to form multiple copies of a polypeptide simultaneously. Such strings of ribosomes are termed as
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Polysome
- B. Polyhedral bodies
- C. Plastidome
- D. Nucleosome
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Q76
BIOLOGY
Unit 6: Reproduction
All of the following are part of an operon except
- A. an operator
- B. structural genes
- C. an enhancer
- D. a promoter
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Q77
BIOLOGY
Unit 6: Reproduction
Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Proliferative Phase
b. Secretory Phase
c. Menstruation
Column II
i. Breakdown of endometrial lining
ii. Follicular Phase
iii. Luteal Phase
↻ Repeated question — also appeared in
2018 (9 sets)
- A. a b c = iii ii i
- B. a b c = i iii ii
- C. a b c = ii iii i
- D. a b c = iii i ii
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Q78
BIOLOGY
Unit 7: Genetics and Evolution
According to Hugo de Vries, the mechanism of evolution is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Multiple step mutations
- B. Saltation
- C. Phenotypic variations
- D. Minor mutations
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Q79
BIOLOGY
Unit 7: Genetics and Evolution
A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Only daughters
- B. Only sons
- C. Only grandchildren
- D. Both sons and daughters
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Q80
BIOLOGY
Unit 7: Genetics and Evolution
AGGTATCGCAT is a sequence from the coding strand of a gene. What will be the corresponding sequence of the transcribed mRNA?
↻ Repeated question — also appeared in
2018 (14 sets)
- A. AGGUAUCGCAU
- B. UGGTUTCGCAT
- C. ACCUAUGCGAU
- D. UCCAUAGCGUA
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Q81
BIOLOGY
Unit 5: Human Physiology
Which of the following gastric cells indirectly help in erythropoiesis?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Chief cells
- B. Mucous cells
- C. Goblet cells
- D. Parietal cells
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Q82
BIOLOGY
Unit 5: Human Physiology
Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Fibrinogen
b. Globulin
c. Albumin
Column II
i. Osmotic balance
ii. Blood clotting
iii. Defence mechanism
↻ Repeated question — also appeared in
2018 (10 sets)
- A. a b c = iii ii i
- B. a b c = i ii iii
- C. a b c = i iii ii
- D. a b c = ii iii i
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Q83
BIOLOGY
Unit 8: Biology and Human Welfare
Which of the following is an occupational respiratory disorder?
↻ Repeated question — also appeared in
2018 (1 set)
- A. Anthracis
- B. Silicosis
- C. Botulism
- D. Emphysema
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Q83
BIOLOGY
Unit 5: Human Physiology
Which of the following is an occupational respiratory disorder?
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Anthracis
- B. Silicosis
- C. Botulism
- D. Emphysema
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Q84
BIOLOGY
Unit 5: Human Physiology
Calcium is important in skeletal muscle contraction because it
↻ Repeated question — also appeared in
2018 (16 sets)
- A. binds to troponin to remove the masking of active sites on actin for myosin.
- B. activates the myosin ATPase by binding to it.
- C. detaches the myosin head from the actin filament.
- D. prevents the formation of bonds between the myosin cross bridges and the actin filament.
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Q84
BIOLOGY
Unit 5: Human Physiology
Calcium is important in skeletal muscle contraction because it
↻ Repeated question — also appeared in
2018 (16 sets)
- A. binds to troponin to remove the masking of active sites on actin for myosin.
- B. activates the myosin ATPase by binding to it.
- C. detaches the myosin head from the actin filament.
- D. prevents the formation of bonds between the myosin cross bridges and the actin filament.
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Q85
BIOLOGY
Unit 8: Biology and Human Welfare
Which of the following is not an autoimmune disease?
↻ Repeated question — also appeared in
2018 (6 sets)
- A. Psoriasis
- B. Rheumatoid arthritis
- C. Alzheimer’s disease
- D. Vitiligo
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Q85
BIOLOGY
Unit 5: Human Physiology
Which of the following is not an autoimmune disease?
↻ Repeated question — also appeared in
2018 (8 sets)
- A. Psoriasis
- B. Rheumatoid arthritis
- C. Alzheimer’s disease
- D. Vitiligo
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Q86
BIOLOGY
Unit 7: Genetics and Evolution
Among the following sets of examples for divergent evolution, select the incorrect option:
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Forelimbs of man, bat and cheetah
- B. Heart of bat, man and cheetah
- C. Brain of bat, man and cheetah
- D. Eye of octopus, bat and man
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Q86
BIOLOGY
Unit 7: Genetics and Evolution
Among the following sets of examples for divergent evolution, select the incorrect option:
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Forelimbs of man, bat and cheetah
- B. Heart of bat, man and cheetah
- C. Brain of bat, man and cheetah
- D. Eye of octopus, bat and man
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Q87
PHYSICS
Unit 2: Kinematics
Conversion of milk to curd improves its nutritional value by increasing the amount of
- A. Vitamin D
- B. Vitamin A
- C. Vitamin B12
- D. Vitamin E
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Q87
BIOLOGY
Unit 5: Human Physiology
Conversion of milk to curd improves its nutritional value by increasing the amount of
- A. Vitamin D
- B. Vitamin A
- C. Vitamin B12
- D. Vitamin E
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Q88
BIOLOGY
Unit 5: Human Physiology
In which disease does mosquito-transmitted pathogen cause chronic inflammation of lymphatic vessels?
↻ Repeated question — also appeared in
2018 (4 sets)
- A. Elephantiasis
- B. Ascariasis
- C. Ringworm disease
- D. Amoebiasis
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Q89
BIOLOGY
Unit 7: Genetics and Evolution
The similarity of bone structure in the forelimbs of many vertebrates is an example of
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Homology
- B. Analogy
- C. Convergent evolution
- D. Adaptive radiation
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Q90
BIOLOGY
Unit 7: Genetics and Evolution
Which of the following characteristics represent inheritance of blood groups in humans?
- A. b, c and e
- B. a, b and c
- C. b, d and e
- D. a, c and e
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Q91
BIOLOGY
Unit 6: Reproduction
Which of the following flowers only once in its lifetime?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Bamboo species
- B. Jackfruit
- C. Mango
- D. Papaya
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Q92
BIOLOGY
Unit 7: Genetics and Evolution
Which of the following pairs is wrongly matched?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Starch synthesis in pea : Multiple alleles
- B. ABO blood grouping : Co-dominance
- C. XO type sex determination : Grasshopper
- D. T.H. Morgan : Linkage
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Q93
BIOLOGY
Unit 7: Genetics and Evolution
Select the correct statement:
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Franklin Stahl coined the term “linkage”.
- B. Punnett square was developed by a British scientist.
- C. Spliceosomes take part in translation.
- D. Transduction was discovered by S. Altman.
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Q94
BIOLOGY
Unit 3: Cell Structure and Function
The experimental proof for semiconservative replication of DNA was first shown in a
↻ Repeated question — also appeared in
2018 (1 set)
- A. Fungus
- B. Bacterium
- C. Plant
- D. Virus
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Q95
BIOLOGY
Unit 6: Reproduction
Offsets are produced by
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Meiotic divisions
- B. Mitotic divisions
- C. Parthenocarpy
- D. Parthenogenesis
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Q96
BIOLOGY
Unit 6: Reproduction
Which of the following has proved helpful in preserving pollen as fossils?
↻ Repeated question — also appeared in
2018 (10 sets)
- A. Pollenkitt
- B. Cellulosic intine
- C. Oil content
- D. Sporopollenin
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Q97
BIOLOGY
Unit 9: Biotechnology and Its Applications
Select the correct match:
↻ Repeated question — also appeared in
2018 (3 sets)
- A. Alec Jeffreys – Streptococcus pneumoniae
- B. Alfred Hershey and Martha Chase – TMV
- C. Matthew Meselson and F. Stahl – Pisum sativum
- D. Francois Jacob and Jacques Monod – Lac operon
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Q98
BIOLOGY
Unit 9: Biotechnology and Its Applications
In India, the organisation responsible for assessing the safety of introducing genetically modified organisms for public use is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Indian Council of Medical Research (ICMR)
- B. Council for Scientific and Industrial Research (CSIR)
- C. Research Committee on Genetic Manipulation (RCGM)
- D. Genetic Engineering Appraisal Committee (GEAC)
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Q99
BIOLOGY
Unit 9: Biotechnology and Its Applications
Which of the following is commonly used as a vector for introducing a DNA fragment in human lymphocytes?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Retrovirus
- B. Ti plasmid
- C. \u03bb phage
- D. pBR 322
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Q100
BIOLOGY
Unit 9: Biotechnology and Its Applications
The correct order of steps in Polymerase Chain Reaction (PCR) is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Extension, Denaturation, Annealing
- B. Annealing, Extension, Denaturation
- C. Denaturation, Extension, Annealing
- D. Denaturation, Annealing, Extension
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Q101
BIOLOGY
Unit 9: Biotechnology and Its Applications
A ‘new’ variety of rice was patented by a foreign company, though such varieties have been present in India for a long time. This is related to
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Co-667
- B. Sharbati Sonora
- C. Lerma Rojo
- D. Basmati
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Q102
BIOLOGY
Unit 9: Biotechnology and Its Applications
Select the correct match:
↻ Repeated question — also appeared in
2018 (3 sets)
- A. Ribozyme – Nucleic acid
- B. F2 × Recessive parent – Dihybrid cross
- C. T.H. Morgan – Transduction
- D. G. Mendel – Transformation
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Q102
BIOLOGY
Unit 7: Genetics and Evolution
Select the correct match:
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Ribozyme – Nucleic acid
- B. 2 × Recessive parent – Dihybrid cross
- C. T. H. Morgan – Transduction
- D. G. Mendel – Transformation
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Q103
BIOLOGY
Unit 9: Biotechnology and Its Applications
Use of bioresources by multinational companies and organisations without authorisation from the concerned country and its people is called
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Bio-infringement
- B. Biopiracy
- C. Biodegradation
- D. Bioexploitation
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Q103
BIOLOGY
Unit 9: Biotechnology and Its Applications
Use of bioresources by multinational companies and organisations without authorisation from the concerned country and its people is called
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Bio-infringement
- B. Biopiracy
- C. Biodegradation
- D. Bioexploitation
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Q104
BIOLOGY
Unit 10: Ecology and Environment
Natality refers to
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Death rate
- B. Birth rate
- C. Number of individuals leaving the habitat
- D. Number of individuals entering a habitat
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Q104
BIOLOGY
Unit 10: Ecology and Environment
Natality refers to
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Death rate
- B. Birth rate
- C. Number of individuals leaving the habitat
- D. Number of individuals entering a habitat
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Q105
BIOLOGY
Unit 10: Ecology and Environment
Niche is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. all the biological factors in the organism’s environment
- B. the physical space where an organism lives
- C. the range of temperature that the organism needs to live
- D. the functional role played by the organism where it lives
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Q105
BIOLOGY
Unit 10: Ecology and Environment
Niche is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. all the biological factors in the organism’s environment
- B. the physical space where an organism lives
- C. the range of temperature that the organism needs to live
- D. the functional role played by the organism where it lives
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Q106
BIOLOGY
Unit 10: Ecology and Environment
What type of ecological pyramid would be obtained with the following data?
Secondary consumer: 120 g
Primary consumer: 60 g
Primary producer: 10 g
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2018 (15 sets)
- A. Inverted pyramid of biomass
- B. Pyramid of energy
- C. Upright pyramid of numbers
- D. Upright pyramid of biomass
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Q107
BIOLOGY
Unit 10: Ecology and Environment
In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen?
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2018 (15 sets)
- A. Carbon
- B. Cl
- C. Fe
- D. Oxygen
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Q136
CHEMISTRY
Unit 10: p-Block Elements
Which of the following statements is not true for halogens?
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- A. All form monobasic oxyacids.
- B. All are oxidizing agents.
- C. All but fluorine show positive oxidation states.
- D. Chlorine has the highest electron-gain enthalpy.
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Q137
CHEMISTRY
Unit 11: d- and f-Block Elements
Considering Ellingham diagram, which of the following metals can be used to reduce alumina?
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2018 (9 sets)
- A. Fe
- B. Zn
- C. Mg
- D. Cu
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Q138
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
In the structure of ClF3, the number of lone pairs of electrons on central atom Cl is
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2018 (13 sets)
- A. one
- B. two
- C. four
- D. three
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Q139
CHEMISTRY
Unit 9: Classification of Elements and Periodicity in Properties
The correct order of atomic radii in group 13 elements is
↻ Repeated question — also appeared in
2018 (12 sets)
- A. B < Al < In < Ga < Tl
- B. B < Al < Ga < In < Tl
- C. B < Ga < Al < Tl < In
- D. B < Ga < Al < In < Tl
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Q140
CHEMISTRY
Unit 10: p-Block Elements
The correct order of N-compounds in decreasing order of oxidation states is
↻ Repeated question — also appeared in
2018 (10 sets)
- A. HNO3, NO, N2, NH4Cl
- B. HNO3, NO, NH4Cl, N2
- C. HNO3, NH4Cl, NO, N2
- D. NH4Cl, N2, NO, HNO3
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Q141
CHEMISTRY
Unit 9: Classification of Elements and Periodicity in Properties
Which one of the following elements is unable to form M6-3 ion?
- A. Ga
- B. Al
- C. B
- D. In
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Q142
CHEMISTRY
Unit 16: Organic Compounds Containing Halogens
The compound A on treatment with Na gives B, and with PCl5 gives C. B and C react together to give diethyl ether. A, B and C are in the order
- A. C2H5OH, C2H6, C2H5Cl
- B. C2H5OH, C2H5Cl, C2H5ONa
- C. C2H5Cl, C2H6, C2H5OH
- D. C2H5OH, C2H5ONa, C2H5Cl
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Q143
CHEMISTRY
Unit 15: Hydrocarbons
Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseous hydrocarbon containing less than four carbon atoms. (A) is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. CH≡CH
- B. CH2=CH2
- C. CH3–CH3
- D. CH4
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Q143
CHEMISTRY
Unit 15: Hydrocarbons
Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseous hydrocarbon containing less than four carbon atoms. (A) is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. CH≡CH
- B. CH2=CH2
- C. CH3–CH3
- D. CH4
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Q144
CHEMISTRY
Unit 15: Hydrocarbons
The compound C7H8 undergoes the following reactions. The product C is
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2018 (3 sets)
- A. m-bromotoluene
- B. o-bromotoluene
- C. 3-bromo-2,4,6-trichlorotoluene
- D. p-bromotoluene
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Q145
CHEMISTRY
Unit 10: p-Block Elements
Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity?
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2018 (8 sets)
- A. N2O5
- B. NO2
- C. N2O
- D. NO
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Q145
CHEMISTRY
Unit 10: p-Block Elements
Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity?
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2018 (8 sets)
- A. N2O5
- B. NO2
- C. N2O
- D. NO
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Q146
CHEMISTRY
Unit 1: Some Basic Concepts in Chemistry
Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations:
a. 60 mL 10 M HCl + 40 mL 10 M NaOH
b. 55 mL 10 M HCl + 45 mL 10 M NaOH
c. 75 mL 5 M HCl + 25 mL 5 M NaOH
d. 100 mL 10 M HCl + 100 mL 10 M NaOH
pH of which one of them will be equal to 1?
- A. b
- B. a
- C. d
- D. c
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Q146
CHEMISTRY
Unit 6: Equilibrium
Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations:
a. 60 mL 10 M HCl + 40 mL 10 M NaOH
b. 55 mL 10 M HCl + 45 mL 10 M NaOH
c. 75 mL 5 M HCl + 25 mL 5 M NaOH
d. 100 mL 10 M HCl + 100 mL 10 M NaOH
pH of which one of them will be equal to 1?
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2018 (10 sets)
- A. b
- B. a
- C. d
- D. c
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Q147
CHEMISTRY
Unit 6: Equilibrium
On which of the following properties does the coagulating power of an ion depend?
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2018 (1 set)
- A. The magnitude of the charge on the ion alone
- B. Size of the ion alone
- C. Both magnitude and sign of the charge on the ion
- D. The sign of charge on the ion alone
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Q148
CHEMISTRY
Unit 6: Equilibrium
The solubility of BaSO4 in water is 2.42 × 10^-3 g L^-1 at 298 K. The value of its solubility product (Ksp) will be (Given molar mass of BaSO4 = 233 g mol^-1)
↻ Repeated question — also appeared in
2018 (13 sets)
- A. 1.08 × 10^-10 mol^2 L^-2
- B. 1.08 × 10^-12 mol^2 L^-2
- C. 1.08 × 10^-14 mol^2 L^-2
- D. 1.08 × 10^-8 mol^2 L^-2
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Q149
CHEMISTRY
Unit 4: Chemical Thermodynamics
Given van der Waals constant for NH3, H2, O2 and CO2 are respectively 4.17, 0.244, 1.36 and 3.59, which one of the following gases is most easily liquefied?
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2018 (2 sets)
- A. NH3
- B. H2
- C. O2
- D. CO2
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Q150
CHEMISTRY
Unit 11: d- and f-Block Elements
Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code:
Column I
a. Co3+
b. Cr3+
c. Fe3+
d. Ni2+
Column II
i. 8 B.M.
ii. 35 B.M.
iii. 3 B.M.
iv. 24 B.M.
v. 15 B.M.
a b c d
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2018 (2 sets)
- A. iv v ii i
- B. i ii iii iv
- C. iv i ii iii
- D. iii v i ii
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Q151
CHEMISTRY
Unit 11: d- and f-Block Elements
Iron carbonyl, Fe(CO)5 is
- A. tetranuclear
- B. mononuclear
- C. trinuclear
- D. dinuclear
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Q152
CHEMISTRY
Unit 12: Coordination Compounds
The geometry and magnetic behaviour of the complex [Ni(CO)4] are
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2018 (15 sets)
- A. square planar geometry and diamagnetic
- B. tetrahedral geometry and diamagnetic
- C. square planar geometry and paramagnetic
- D. tetrahedral geometry and paramagnetic
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Q153
CHEMISTRY
Unit 12: Coordination Compounds
Which one of the following ions exhibits d-d transition and paramagnetism as well?
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2018 (5 sets)
- A. [CrO4]2-
- B. [Cr2O7]2-
- C. [MnO4]-
- D. [MnO4]2-
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Q154
CHEMISTRY
Unit 12: Coordination Compounds
The type of isomerism shown by the complex [CoCl2(en)2] is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Geometrical isomerism
- B. Coordination isomerism
- C. Ionization isomerism
- D. Linkage isomerism
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Q156
CHEMISTRY
Unit 18: Organic Compounds Containing Nitrogen
Which of the following compounds can form a zwitterion?
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2018 (5 sets)
- A. Aniline
- B. Acetanilide
- C. Benzoic acid
- D. Glycine
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Q157
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
Which of the following molecules represents the order of hybridisation sp2, sp2, sp, sp from left to right atoms?
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2018 (11 sets)
- A. HC≡C–C≡CH
- B. CH2=CH–C≡CH
- C. CH2=CH–CH=CH2
- D. CH3–CH=CH–CH3
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Q159
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
Which of the following is correct with respect to –I effect of the substituents? (R = alkyl)
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2018 (13 sets)
- A. –NH2 < –OR < –F
- B. –NR2 < –OR < –F
- C. –NH2 > –OR > –F
- D. –NR2 > –OR > –F
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Q160
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is 1s² 2s² 2p³, the simplest formula for this compound is
↻ Repeated question — also appeared in
2018 (13 sets)
- A. Mg2X3
- B. MgX2
- C. Mg2X
- D. Mg3X2
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Q161
PHYSICS
Unit 7: Properties of Solids and Liquids
Iron exhibits bcc structure at room temperature. Above 900°C, it transforms to fcc structure. The ratio of density of iron at room temperature to that at 900°C (assuming molar mass and atomic radii of iron remains constant with temperature) is
↻ Repeated question — also appeared in
2018 (8 sets)
- A. 2/3
- B. 23/34
- C. 24/33
- D. 2/1
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Q161
PHYSICS
Unit 5: Rotational Motion
Iron exhibits bcc structure at room temperature. Above 900°C, it transforms to fcc structure. The ratio of density of iron at room temperature to that at 900°C (assuming molar mass and atomic radii of iron remains constant with temperature) is
↻ Repeated question — also appeared in
2018 (2 sets)
- A. 2/3
- B. 23/34
- C. 24/33
- D. 2/1
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Q162
CHEMISTRY
Unit 2: Atomic Structure
Which one is a wrong statement?
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- A. Total orbital angular momentum of electron in ‘s’ orbital is equal to zero.
- B. An orbital is designated by three quantum numbers while an electron in an atom is designated by four quantum numbers.
- C. The electronic configuration of N atom is
- D. The value of m for 2z d is zero.
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Q162
CHEMISTRY
Unit 2: Atomic Structure
Which one is a wrong statement ?
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2018 (11 sets)
- A. Total orbital angular momentum of electron in s orbital is equal to zero.
- B. An orbital is designated by three quantum numbers while an electron in an atom is designated by four quantum numbers.
- C. The electronic configuration of N atom is
- D. The value of m for 2z d is zero.
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Q163
CHEMISTRY
Unit 2: Atomic Structure
Consider the following species: CN+, CN−, NO and CN. Which one of these will have the highest bond order?
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2018 (2 sets)
- A. NO
- B. CN−
- C. CN+
- D. CN
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Q164
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
In the reaction, the electrophile involved is
- A. dichloromethyl cation (CHCl2+)
- B. formyl cation (CHO+)
- C. dichloromethyl anion (CHCl2−)
- D. dichlorocarbene (:CCl2)
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Q165
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their
↻ Repeated question — also appeared in
2018 (13 sets)
- A. formation of intramolecular H-bonding
- B. formation of carboxylate ion
- C. more extensive association of carboxylic acid via van der Waals force of attraction
- D. formation of intermolecular H-bonding
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Q166
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Compound A, C8H10O, is found to react with NaOI (produced by reacting Y with NaOH) and yields a yellow precipitate with characteristic smell. A and Y are respectively
↻ Repeated question — also appeared in
2018 (4 sets)
- A. ethoxybenzene and iodine
- B. acetophenone and iodine
- C. ethyl phenyl ether and iodine
- D. 1-phenylethanol and iodine
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Q167
CHEMISTRY
Unit 8: Chemical Kinetics
The correct difference between first- and second-order reactions is that
↻ Repeated question — also appeared in
2018 (15 sets)
- A. the rate of a first-order reaction does not depend on reactant concentrations; the rate of a second-order reaction does depend on reactant concentrations
- B. the half-life of a first-order reaction does not depend on [A]0; the half-life of a second-order reaction does depend on [A]0
- C. a first-order reaction can be catalyzed; a second-order reaction cannot be catalyzed
- D. the rate of a first-order reaction does depend on reactant concentrations; the rate of a second-order reaction does not depend on reactant concentrations
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Q168
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Among CaH2, BeH2, BaH2, the order of ionic character is
↻ Repeated question — also appeared in
2018 (7 sets)
- A. BeH2 < CaH2 < BaH2
- B. CaH2 < BeH2 < BaH2
- C. BeH2 < BaH2 < CaH2
- D. BaH2 < BeH2 < CaH2
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Q169
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
Consider the change in oxidation state of bromine corresponding to different emf values as shown in the diagram below. Then the species undergoing disproportionation is
↻ Repeated question — also appeared in
2018 (2 sets)
- A. Br3O−
- B. Br4O−
- C. Br2
- D. HBrO
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Q170
CHEMISTRY
Unit 1: Some Basic Concepts in Chemistry
In which case is the number of molecules of water maximum ?
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2018 (15 sets)
- A. 18 mL of water
- B. 0.18 g of water
- C. 0.00224 L of water vapours at 1 atm and 273 K
- D. 10−3 mol of water
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Q171
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
Regarding cross-linked or network polymers, which of the following statements is incorrect ?
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2018 (7 sets)
- A. They contain covalent bonds between various linear polymer chains.
- B. They are formed from bi- and tri-functional monomers.
- C. Examples are bakelite and melamine.
- D. They contain strong covalent bonds in their polymer chains.
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Q172
CHEMISTRY
Unit 18: Organic Compounds Containing Nitrogen
Nitration of aniline in strong acidic medium also gives m-nitroaniline because
↻ Repeated question — also appeared in
2018 (12 sets)
- A. In spite of substituents nitro group always goes to only m-position.
- B. In electrophilic substitution reactions amino group is meta directive.
- C. In absence of substituents nitro group always goes to m-position.
- D. In acidic (strong) medium aniline is present as anilinium ion.
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Q173
CHEMISTRY
Unit 10: p-Block Elements
Which of the following oxides is most acidic in nature ?
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2018 (8 sets)
- A. MgO
- B. BeO
- C. BaO
- D. CaO
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Q173
CHEMISTRY
Unit 10: p-Block Elements
Which of the following oxides is most acidic in nature?
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2018 (8 sets)
- A. MgO
- B. BeO
- C. BaO
- D. CaO
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Q174
CHEMISTRY
Unit 19: Biomolecules
The difference between amylose and amylopectin is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Amylopectin have 1→4 α-linkage and 1→6 α-linkage
- B. Amylose have 1→4 α-linkage and 1→6 β-linkage
- C. Amylopectin have 1→4 α-linkage and 1→6 β-linkage
- D. Amylose is made up of glucose and galactose
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Q174
CHEMISTRY
Unit 19: Biomolecules
The difference between amylose and amylopectin is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Amylopectin has 1→4 α-linkage and 1→6 α-linkage
- B. Amylose has 1→4 α-linkage and 1→6 β-linkage
- C. Amylopectin has 1→4 α-linkage and 1→6 β-linkage
- D. Amylose is made up of glucose and galactose
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Q175
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
A mixture of 2.3 g formic acid and 4.5 g oxalic acid is treated with conc. H2SO4. The evolved gaseous mixture is passed through KOH pellets. Weight (in g) of the remaining product at STP will be
↻ Repeated question — also appeared in
2018 (5 sets)
- A. 1.4
- B. 3.0
- C. 2.8
- D. 4.4
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Q176
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
For the redox reaction MnO4− + C2O4^2− + H+ → Mn2+ + CO2 + H2O, the correct coefficients of the reactants for the balanced equation are
↻ Repeated question — also appeared in
2018 (9 sets)
- A. 16 5 2
- B. 2 5 16
- C. 2 16 5
- D. 5 16 2
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Q176
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
For the redox reaction MnO4− + C2O4^2− + H+ → Mn2+ + CO2 + H2O, the correct coefficients of the reactants for the balanced equation are
↻ Repeated question — also appeared in
2018 (9 sets)
- A. 16, 5, 2
- B. 2, 5, 16
- C. 2, 16, 5
- D. 5, 16, 2
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Q177
CHEMISTRY
Unit 4: Chemical Thermodynamics
The correction factor ‘a’ to the ideal gas equation corresponds to
↻ Repeated question — also appeared in
2018 (4 sets)
- A. density of the gas molecules
- B. volume of the gas molecules
- C. electric field present between the gas molecules
- D. forces of attraction between the gas molecules
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Q177
CHEMISTRY
Unit 4: Chemical Thermodynamics
The correction factor ‘a’ to the ideal gas equation corresponds to
↻ Repeated question — also appeared in
2018 (4 sets)
- A. density of the gas molecules
- B. volume of the gas molecules
- C. electric field present between the gas molecules
- D. forces of attraction between the gas molecules
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Q178
CHEMISTRY
Unit 6: Equilibrium
Which one of the following conditions will favour maximum formation of the product in the reaction, A2(g) + B2(g) ⇌ 2X2(g), ΔrH = −X kJ?
↻ Repeated question — also appeared in
2018 (12 sets)
- A. Low temperature and high pressure
- B. Low temperature and low pressure
- C. High temperature and high pressure
- D. High temperature and low pressure
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Q179
CHEMISTRY
Unit 8: Chemical Kinetics
The bond dissociation energies of X2, Y2 and XY are in the ratio 1 : 0.5 : 1. If ΔH for the formation of XY is −200 kJ mol−1, the bond dissociation energy of X2 will be
- A. 200 kJ mol−1
- B. 100 kJ mol−1
- C. 800 kJ mol−1
- D. 400 kJ mol−1
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Q180
CHEMISTRY
Unit 8: Chemical Kinetics
When initial concentration of the reactant is doubled, the half-life period of a zero order reaction
↻ Repeated question — also appeared in
2018 (15 sets)
- A. is halved
- B. is doubled
- C. is tripled
- D. remains unchanged
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