Q1
PHYSICS
Unit 11: Electrostatics
A parallel plate capacitor has a uniform electric field E in the space between the plates. If the distance between the plates is d and the area of each plate is A, the energy stored in the capacitor is: (ε0 = permittivity of free space)
↻ Repeated question — also appeared in
2021 (12 sets)
- A. ε0EAd
- B. 1/2 ε0E^2 Ad
- C. ε0E^2 Ad
- D. 1/2 ε0E^2
Correct answer & explanation hidden
Log in to view solution →
Q1
PHYSICS
Unit 11: Electrostatics
A parallel plate capacitor has a uniform electric field ‘E’ in the space between the plates. If the distance between the plates is ‘d’ and the area of each plate is ‘A’, the energy stored in the capacitor is: (ε₀ = permittivity of free space)
↻ Repeated question — also appeared in
2021 (12 sets)
- A. ε₀EAd
- B. (1/2)ε₀E²Ad
- C. E²Ad/ε₀
- D. (1/2)ε₀E²
Correct answer & explanation hidden
Log in to view solution →
Q2
PHYSICS
Unit 7: Properties of Solids and Liquids
The velocity of a small ball of mass M and density d, when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is d/2, then the viscous force acting on the ball will be:
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Mg
- B. 3/2 Mg
- C. 2 Mg
- D. Mg/2
Correct answer & explanation hidden
Log in to view solution →
Q2
PHYSICS
Unit 7: Properties of Solids and Liquids
The velocity of a small ball of mass M and density d, when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is d/2, then the viscous force acting on the ball will be:
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Mg
- B. 3Mg/2
- C. 2Mg
- D. Mg/2
Correct answer & explanation hidden
Log in to view solution →
Q3
PHYSICS
Unit 12: Current Electricity
The effective resistance of a parallel connection that consists of four wires of equal length, equal area of cross-section and same material is 0.25 Ω. What will be the effective resistance if they are connected in series?
↻ Repeated question — also appeared in
2021 (12 sets)
- A. 0.5 Ω
- B. 1 Ω
- C. 4 Ω
- D. 0.25 Ω
Correct answer & explanation hidden
Log in to view solution →
Q3
PHYSICS
Unit 12: Current Electricity
The effective resistance of a parallel connection that consists of four wires of equal length, equal area of cross-section and same material is 0.25 Ω. What will be the effective resistance if they are connected in series?
↻ Repeated question — also appeared in
2021 (12 sets)
- A. 0.5 Ω
- B. 1 Ω
- C. 4 Ω
- D. 0.25 Ω
Correct answer & explanation hidden
Log in to view solution →
Q4
PHYSICS
Unit 16: Optics
A convex lens A of focal length 20 cm and a concave lens B of focal length 5 cm are kept along the same axis with a distance d between them. If a parallel beam of light falling on A leaves B as a parallel beam, then the distance d in cm will be:
↻ Repeated question — also appeared in
2021 (10 sets)
- A. 15
- B. 50
- C. 30
- D. 25
Correct answer & explanation hidden
Log in to view solution →
Q4
PHYSICS
Unit 16: Optics
A convex lens ‘A’ of focal length 20 cm and a concave lens ‘B’ of focal length 5 cm are kept along the same axis with a distance ‘d’ between them. If a parallel beam of light falling on ‘A’ leaves ‘B’ as a parallel beam, then the distance ‘d’ in cm will be:
↻ Repeated question — also appeared in
2021 (10 sets)
- A. 15
- B. 50
- C. 30
- D. 25
Correct answer & explanation hidden
Log in to view solution →
Q5
PHYSICS
Unit 1: Physics and Measurement
If force [F], acceleration [A] and time [T] are chosen as the fundamental physical quantities. Find the dimensions of energy.
↻ Repeated question — also appeared in
2021 (11 sets)
- A. [F] [A] [T²]
- B. [F] [A] [T⁻¹]
- C. [F] [A⁻¹] [T]
- D. [F] [A] [T]
Correct answer & explanation hidden
Log in to view solution →
Q6
PHYSICS
Unit 12: Current Electricity
Match Column I with Column II based on current flow through a metallic conductor.
- A. (A)-(R), (B)-(S), (C)-(Q), (D)-(P)
- B. (A)-(R), (B)-(P), (C)-(S), (D)-(Q)
- C. (A)-(R), (B)-(Q), (C)-(S), (D)-(P)
- D. (A)-(R), (B)-(S), (C)-(P), (D)-(Q)
Correct answer & explanation hidden
Log in to view solution →
Q8
PHYSICS
Unit 8: Thermodynamics
A cup of coffee cools from 90°C to 80°C in t minutes, when the room temperature is 20°C. The time taken by a similar cup of coffee to cool from 80°C to 60°C at a room temperature same at 20°C is:
↻ Repeated question — also appeared in
2021 (6 sets)
- A. 13t/5
- B. 10t/13
- C. 5t/13
- D. 13t/10
Correct answer & explanation hidden
Log in to view solution →
Q11
PHYSICS
Unit 11: Electrostatics
Two charged spherical conductors of radius R₁ and R₂ are connected by a wire. Then the ratio of surface charge densities of the spheres (σ₁/σ₂) is:
↻ Repeated question — also appeared in
2021 (11 sets)
- A. R₂/R₁
- B. (R₁/R₂)²
- C. R₂²/R₁²
- D. R₁/R₂
Correct answer & explanation hidden
Log in to view solution →
Q12
PHYSICS
Unit 14: Electromagnetic Induction and Alternating Currents
An inductor of inductance L, a capacitor of capacitance C and a resistor of resistance R are connected in series. Potential difference across L, C and R is 40 V, 10 V and 40 V, respectively. The amplitude of current is 10√2 A. The impedance of the circuit is:
↻ Repeated question — also appeared in
2021 (4 sets)
- A. 5√2 Ω
- B. 4 Ω
- C. 5 Ω
- D. 4√2 Ω
Correct answer & explanation hidden
Log in to view solution →
Q14
PHYSICS
Unit 19: Electronic Devices
Consider the following statements (A) and (B): (A) A zener diode is connected in reverse bias, when used as a voltage regulator. (B) The potential barrier of p-n junction lies between 0.1 V to 0.3 V.
↻ Repeated question — also appeared in
2021 (11 sets)
- A. (A) and (B) both are incorrect.
- B. (A) is correct and (B) is incorrect.
- C. (A) is incorrect but (B) is correct.
- D. (A) and (B) both are correct.
Correct answer & explanation hidden
Log in to view solution →
Q15
PHYSICS
Unit 16: Optics
A lens of large focal length and large aperture is best suited as an objective of an astronomical telescope since:
↻ Repeated question — also appeared in
2021 (9 sets)
- A. a large aperture contributes to the quality and visibility of the images.
- B. a large area of the objective ensures better light gathering power.
- C. a large aperture provides a better resolution.
- D. all of the above.
Correct answer & explanation hidden
Log in to view solution →
Q16
PHYSICS
Unit 12: Current Electricity
In a potentiometer circuit a cell of EMF 1.5 V gives balance point at 36 cm length of wire. If another cell of EMF 2.5 V replaces the first cell, then at what length of the wire, the balance point occurs?
↻ Repeated question — also appeared in
2021 (11 sets)
- A. 21.6 cm
- B. 64 cm
- C. 62 cm
- D. 60 cm
Correct answer & explanation hidden
Log in to view solution →
Q16
PHYSICS
Unit 12: Current Electricity
In a potentiometer circuit a cell of EMF 1.5 V gives balance point at 36 cm length of wire. If another cell of EMF 2.5 V replaces the first cell, then at what length of the wire, the balance point occurs?
↻ Repeated question — also appeared in
2021 (11 sets)
- A. 21.6 cm
- B. 64 cm
- C. 62 cm
- D. 60 cm
Correct answer & explanation hidden
Log in to view solution →
Q17
PHYSICS
Unit 6: Gravitation
The escape velocity from the Earth’s surface is v. The escape velocity from the surface of another planet having a radius, four times that of Earth and same mass density is:
↻ Repeated question — also appeared in
2021 (12 sets)
- A. 2v
- B. 3v
- C. 4v
- D. v
Correct answer & explanation hidden
Log in to view solution →
Q17
PHYSICS
Unit 6: Gravitation
The escape velocity from the Earth’s surface is v. The escape velocity from the surface of another planet having a radius, four times that of Earth and same mass density is:
↻ Repeated question — also appeared in
2021 (12 sets)
- A. 2 v
- B. 3 v
- C. 4 v
- D. v
Correct answer & explanation hidden
Log in to view solution →
Q18
PHYSICS
Unit 10: Oscillations and Waves
A body is executing simple harmonic motion with frequency ‘n’, the frequency of its potential energy is:
↻ Repeated question — also appeared in
2021 (12 sets)
- A. 2n
- B. 3n
- C. 4n
- D. n
Correct answer & explanation hidden
Log in to view solution →
Q18
PHYSICS
Unit 10: Oscillations and Waves
A body is executing simple harmonic motion with frequency ‘n’, the frequency of its potential energy is:
↻ Repeated question — also appeared in
2021 (12 sets)
- A. 2n
- B. 3n
- C. 4n
- D. n
Correct answer & explanation hidden
Log in to view solution →
Q19
PHYSICS
Unit 1: Physics and Measurement
A screw gauge gives the following readings when used to measure the diameter of a wire. Main scale reading: 0 mm. Circular scale reading: 52 divisions. Given that 1 mm on main scale corresponds to 100 divisions on the circular scale. The diameter of the wire from the above data is:
↻ Repeated question — also appeared in
2021 (6 sets)
- A. 0.026 cm
- B. 0.26 cm
- C. 0.052 cm
- D. 0.52 cm
Correct answer & explanation hidden
Log in to view solution →
Q21
PHYSICS
Unit 14: Electromagnetic Induction and Alternating Currents
A capacitor of capacitance ‘C’, is connected across an ac source of voltage V, given by V=V0 sin(ωt). The displacement current between the plates of the capacitor, would then be given by:
↻ Repeated question — also appeared in
2021 (1 set)
- A. Id = V0 ωC cos(ωt)
- B. Id = V0 / (ωC) sin(ωt)
- C. Id = V0 ωC sin(ωt)
- D. Id = V0 ωC cos(ωt)
Correct answer & explanation hidden
Log in to view solution →
Q22
PHYSICS
Unit 11: Electrostatics
Polar molecules are the molecules:
↻ Repeated question — also appeared in
2021 (11 sets)
- A. acquire a dipole moment only in the presence of electric field due to displacement of charges.
- B. acquire a dipole moment only when magnetic field is absent.
- C. having a permanent electric dipole moment.
- D. having zero dipole moment.
Correct answer & explanation hidden
Log in to view solution →
Q23
PHYSICS
Unit 17: Dual Nature of Matter and Radiation
The number of photons per second on an average emitted by the source of monochromatic light of wavelength 600 nm, when it delivers the power of 3.3×10^-3 watt will be : (h=6.6×10^-34 Js)
↻ Repeated question — also appeared in
2021 (11 sets)
- A. 10^17
- B. 10^16
- C. 10^15
- D. 10^18
Correct answer & explanation hidden
Log in to view solution →
Q24
PHYSICS
Unit 19: Electronic Devices
The electron concentration in an n-type semiconductor is the same as hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them.
↻ Repeated question — also appeared in
2021 (10 sets)
- A. current in p-type > current in n-type.
- B. current in n-type > current in p-type.
- C. No current will flow in p-type, current will only flow in n-type.
- D. current in n-type=current in p-type.
Correct answer & explanation hidden
Log in to view solution →
Q25
PHYSICS
Unit 10: Oscillations and Waves
A spring is stretched by 5 cm by a force 10 N. The time period of the oscillations when a mass of 2 kg is suspended by it is:
↻ Repeated question — also appeared in
2021 (11 sets)
- A. 6.28 s
- B. 3.14 s
- C. 0.628 s
- D. 0.0628 s
Correct answer & explanation hidden
Log in to view solution →
Q26
PHYSICS
Unit 18: Atoms and Nuclei
A nucleus with mass number 240 breaks into two fragments each of mass number 120, the binding energy per nucleon of unfragmented nuclei is 7.6 MeV while that of fragments is 8.5 MeV. The total gain in the Binding Energy in the process is:
↻ Repeated question — also appeared in
2021 (11 sets)
- A. 9.4 MeV
- B. 804 MeV
- C. 216 MeV
- D. 0.9 MeV
Correct answer & explanation hidden
Log in to view solution →
Q28
PHYSICS
Unit 2: Kinematics
A small block slides down on a smooth inclined plane, starting from rest at time t=0. Let Sn be the distance travelled by the block in the interval t=n-1 to t=n. Then, the ratio Sn / Sn+1 is:
↻ Repeated question — also appeared in
2021 (9 sets)
- A. (2n-1)/(2n+1)
- B. (2n+1)/(2n-1)
- C. 2n/(2n-1)
- D. (2n-1)/2n
Correct answer & explanation hidden
Log in to view solution →
Q28
PHYSICS
Unit 2: Kinematics
A small block slides down on a smooth inclined plane, starting from rest at time t=0. Let Sn be the distance travelled by the block in the interval t=n-1 to t=n. Then, the ratio Sn / Sn+1 is:
↻ Repeated question — also appeared in
2021 (9 sets)
- A. (2n-1)/(2n+1)
- B. (2n+1)/(2n-1)
- C. 2n/(2n-1)
- D. (2n-1)/2n
Correct answer & explanation hidden
Log in to view solution →
Q29
PHYSICS
Unit 4: Work Energy and Power
A particle is released from height S from the surface of the Earth. At a certain height its kinetic energy is three times its potential energy. The height from the surface of earth and the speed of the particle at that instant are respectively:
- A. 3S/4, sqrt(3gS/2)
- B. 3S/2, sqrt(3gS/2)
- C. S/4, sqrt(3gS/2)
- D. S/4, sqrt(3gS/4)
Correct answer & explanation hidden
Log in to view solution →
Q30
PHYSICS
Unit 18: Atoms and Nuclei
A radioactive nucleus (A, Z)X undergoes spontaneous decay in the sequence (A, Z)X -> (A, Z-1)B -> (A, Z-3)C -> (A, Z-2)D, where Z is the atomic number of element X. The possible decay particles in the sequence are:
↻ Repeated question — also appeared in
2021 (2 sets)
- A. α, β+, β-
- B. β+, α, β-
- C. β-, α, β+
- D. α, β-, β+
Correct answer & explanation hidden
Log in to view solution →
Q32
PHYSICS
Unit 1: Physics and Measurement
If E and G respectively denote energy and gravitational constant, then E/G has the dimensions of:
↻ Repeated question — also appeared in
2021 (10 sets)
- A. [M][L^-1][T^-1]
- B. [M][L^0][T^0]
- C. [M^2][L^-2][T^-1]
- D. [M^2][L^-1][T^0]
Correct answer & explanation hidden
Log in to view solution →
Q33
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
An infinitely long straight conductor carries a current of 5 A. An electron is moving with a speed of 10^5 m/s parallel to the conductor. The perpendicular distance between the electron and the conductor is 20 cm at an instant. Calculate the magnitude of the force experienced by the electron at that instant.
↻ Repeated question — also appeared in
2021 (8 sets)
- A. 8π×10^-20 N
- B. 4π×10^-20 N
- C. 8×10^-20 N
- D. 4×10^-20 N
Correct answer & explanation hidden
Log in to view solution →
Q34
PHYSICS
Unit 18: Atoms and Nuclei
The half-life of a radioactive nuclide is 100 hours. The fraction of original activity that will remain after 150 hours would be:
↻ Repeated question — also appeared in
2021 (11 sets)
- A. 1/(2√2)
- B. 2/3
- C. 2/(3√2)
- D. 1/2
Correct answer & explanation hidden
Log in to view solution →
Q35
PHYSICS
Unit 4: Work Energy and Power
Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional force are 10% of the input energy. How much power is generated by the turbine? (g=10 m/s^2)
↻ Repeated question — also appeared in
2021 (11 sets)
- A. 8.1 kW
- B. 12.3 kW
- C. 7.0 kW
- D. 10.2 kW
Correct answer & explanation hidden
Log in to view solution →
Q38
PHYSICS
Unit 11: Electrostatics
Twenty seven drops of same size are charged at 220 V each. They combine to form a bigger drop. Calculate the potential of the bigger drop.
↻ Repeated question — also appeared in
2021 (11 sets)
- A. 1320 V
- B. 1520 V
- C. 1980 V
- D. 660 V
Correct answer & explanation hidden
Log in to view solution →
Q39
PHYSICS
Unit 14: Electromagnetic Induction and Alternating Currents
A series LCR circuit containing 5.0 H inductor, 80 µF capacitor and 40 Ω resistor is connected to 230 V variable frequency ac source. The angular frequencies of the source at which power transferred to the circuit is half the power at the resonant angular frequency are likely to be:
↻ Repeated question — also appeared in
2021 (7 sets)
- A. 50 rad/s and 25 rad/s
- B. 46 rad/s and 54 rad/s
- C. 42 rad/s and 58 rad/s
- D. 25 rad/s and 75 rad/s
Correct answer & explanation hidden
Log in to view solution →
Q41
PHYSICS
Unit 12: Current Electricity
Three resistors having resistances r1, r2 and r3 are connected as shown in the given circuit. The ratio i3/i1 of currents in terms of resistances used in the circuit is:
↻ Repeated question — also appeared in
2021 (2 sets)
- A. r2 / (r2 + r3)
- B. r1 / (r1 + r2)
- C. r2 / (r1 + r3)
- D. r1 / (r2 + r3)
Correct answer & explanation hidden
Log in to view solution →
Q42
PHYSICS
Unit 14: Electromagnetic Induction and Alternating Currents
Two conducting circular loops of radii R1 and R2 are placed in the same plane with their centres coinciding. If R1 >> R2, the mutual inductance M between them will be directly proportional to:
↻ Repeated question — also appeared in
2021 (6 sets)
- A. R1/R2
- B. R1^2/R2
- C. R2^2/R1
- D. R1/R2^2
Correct answer & explanation hidden
Log in to view solution →
Q42
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
Two conducting circular loops of radii R1 and R2 are placed in the same plane with their centres coinciding. If R1 >> R2, the mutual inductance M between them will be directly proportional to :
↻ Repeated question — also appeared in
2021 (4 sets)
- A. R2 / R1
- B. R2^2 / R1
- C. R2^2 / R1^2
- D. R1 / R2
Correct answer & explanation hidden
Log in to view solution →
Q43
PHYSICS
Unit 3: Laws of Motion
A ball of mass 0.15 kg is dropped from a height 10 m, strikes the ground and rebounds to the same height. The magnitude of impulse imparted to the ball is (g=10 m/s^2) nearly:
↻ Repeated question — also appeared in
2021 (9 sets)
- A. 4.2 kg m/s
- B. 2.1 kg m/s
- C. 1.4 kg m/s
- D. 0 kg m/s
Correct answer & explanation hidden
Log in to view solution →
Q43
PHYSICS
Unit 3: Laws of Motion
A ball of mass 0.15 kg is dropped from a height 10 m, strikes the ground and rebounds to the same height. The magnitude of impulse imparted to the ball is (g=10 m/s2) nearly :
↻ Repeated question — also appeared in
2021 (9 sets)
- A. 4.2 kg m/s
- B. 2.1 kg m/s
- C. 1.4 kg m/s
- D. 0 kg m/s
Correct answer & explanation hidden
Log in to view solution →
Q46
PHYSICS
Unit 2: Kinematics
A car starts from rest and accelerates at 5 m/s2. At t=4 s, a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at t=6 s ? (Take g=10 m/s2)
↻ Repeated question — also appeared in
2021 (8 sets)
- A. 20 m/s, 0
- B. 20 sqrt(2) m/s, 0
- C. 20 sqrt(2) m/s, 10 m/s2
- D. 20 m/s, 5 m/s2
Correct answer & explanation hidden
Log in to view solution →
Q47
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
A uniform conducting wire of length 12a and resistance ‘R’ is wound up as a current carrying coil in the shape of, (i) an equilateral triangle of side ‘a’. (ii) a square of side ‘a’. The magnetic dipole moments of the coil in each case respectively are :
↻ Repeated question — also appeared in
2021 (5 sets)
- A. 3 Ia^2 and Ia^2
- B. 3 Ia^2 and 4 Ia^2
- C. 4 Ia^2 and 3 Ia^2
- D. 3 Ia^2 and 3 Ia^2
Correct answer & explanation hidden
Log in to view solution →
Q49
PHYSICS
Unit 14: Electromagnetic Induction and Alternating Currents
A step down transformer connected to an ac mains supply of 220 V is made to operate at 11 V, 44 W lamp. Ignoring power losses in the transformer, what is the current in the primary circuit ?
↻ Repeated question — also appeared in
2021 (10 sets)
- A. 0.4 A
- B. 2 A
- C. 4 A
- D. 0.2 A
Correct answer & explanation hidden
Log in to view solution →
Q52
CHEMISTRY
Unit 5: Solutions
The following solutions were prepared by dissolving 10 g of glucose (C6H12O6) in 250 ml of water (P1), 10 g of urea (CH4N2O) in 250 ml of water (P2) and 10 g of sucrose (C12H22O11) in 250 ml of water (P3). The right option for the decreasing order of osmotic pressure of these solutions is :
↻ Repeated question — also appeared in
2021 (9 sets)
- A. P1 > P2 > P3
- B. P2 > P3 > P1
- C. P3 > P1 > P2
- D. P2 > P1 > P3
Correct answer & explanation hidden
Log in to view solution →
Q53
CHEMISTRY
Unit 2: Atomic Structure
Tritium, a radioactive isotope of hydrogen, emits which of the following particles ?
↻ Repeated question — also appeared in
2021 (3 sets)
- A. Alpha (α)
- B. Gamma (γ)
- C. Neutron (n)
- D. Beta (β-)
Correct answer & explanation hidden
Log in to view solution →
Q54
CHEMISTRY
Unit 10: p-Block Elements
Which one of the following methods can be used to obtain highly pure metal which is liquid at room temperature?
↻ Repeated question — also appeared in
2021 (1 set)
- A. Chromatography
- B. Distillation
- C. Zone refining
- D. Electrolysis
Correct answer & explanation hidden
Log in to view solution →
Q55
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
BF3 is planar and electron deficient compound. Hybridization and number of electrons around the central atom, respectively are :
↻ Repeated question — also appeared in
2021 (11 sets)
- A. sp3 and 6
- B. sp2 and 6
- C. sp2 and 8
- D. sp3 and 4
Correct answer & explanation hidden
Log in to view solution →
Q55
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
BF3 is planar and electron deficient compound. Hybridization and number of electrons around the central atom, respectively are :
↻ Repeated question — also appeared in
2021 (11 sets)
- A. sp3 and 6
- B. sp2 and 6
- C. sp2 and 8
- D. sp3 and 4
Correct answer & explanation hidden
Log in to view solution →
Q57
CHEMISTRY
Unit 10: p-Block Elements
Noble gases are named because of their inertness towards reactivity. Identify an incorrect statement about them.
↻ Repeated question — also appeared in
2021 (11 sets)
- A. Noble gases have very high melting and boiling points.
- B. Noble gases have weak dispersion forces.
- C. Noble gases have large positive values of electron gain enthalpy.
- D. Noble gases are sparingly soluble in water.
Correct answer & explanation hidden
Log in to view solution →
Q57
CHEMISTRY
Unit 10: p-Block Elements
Noble gases are named because of their inertness towards reactivity. Identify an incorrect statement about them.
↻ Repeated question — also appeared in
2021 (11 sets)
- A. Noble gases have very high melting and boiling points.
- B. Noble gases have weak dispersion forces.
- C. Noble gases have large positive values of electron gain enthalpy.
- D. Noble gases are sparingly soluble in water.
Correct answer & explanation hidden
Log in to view solution →
Q58
CHEMISTRY
Unit 12: Coordination Compounds
Ethylene diaminetetraacetate (EDTA) ion is :
↻ Repeated question — also appeared in
2021 (11 sets)
- A. Unidentate ligand
- B. Bidentate ligand with two “N” donor atoms
- C. Tridentate ligand with three “N” donor atoms
- D. Hexadentate ligand with four “O” and two “N” donor atoms
Correct answer & explanation hidden
Log in to view solution →
Q58
CHEMISTRY
Unit 12: Coordination Compounds
Ethylene diaminetetraacetate (EDTA) ion is :
↻ Repeated question — also appeared in
2021 (11 sets)
- A. Unidentate ligand
- B. Bidentate ligand with two “N” donor atoms
- C. Tridentate ligand with three “N” donor atoms
- D. Hexadentate ligand with four “O” and two “N” donor atoms
Correct answer & explanation hidden
Log in to view solution →
Q60
BIOLOGY
Unit 8: Biology and Human Welfare
Given below are two statements : Statement I : Aspirin and Paracetamol belong to the class of narcotic analgesics. Statement II : Morphine and Heroin are non-narcotic analgesics. In the light of the above statements, choose the correct answer from the options given below.
↻ Repeated question — also appeared in
2021 (4 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 →
Q61
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
Which of the following reactions is the metal displacement reaction ? Choose the right option.
↻ Repeated question — also appeared in
2021 (7 sets)
- A. Cr2O3 + 2Al -> Al2O3 + 2Cr
- B. Fe + 2HCl -> FeCl2 + H2
- C. 2Pb(NO3)2 -> 2PbO + 4NO2 + O2
- D. 2KClO3 -> 2KCl + 3O2
Correct answer & explanation hidden
Log in to view solution →
Q63
CHEMISTRY
Unit 15: Hydrocarbons
The major product formed in dehydrohalogenation reaction of 2-Bromo pentane is Pent-2-ene. This product formation is based on ?
↻ Repeated question — also appeared in
2021 (9 sets)
- A. Hund’s Rule
- B. Hofmann Rule
- C. Huckel’s Rule
- D. Saytzeff’s Rule
Correct answer & explanation hidden
Log in to view solution →
Q64
CHEMISTRY
Unit 10: p-Block Elements
The structures of beryllium chloride in solid state and vapour phase, are :
↻ Repeated question — also appeared in
2021 (9 sets)
- A. Linear in both
- B. Dimer and Linear, respectively
- C. Chain in both
- D. Chain and dimer, respectively
Correct answer & explanation hidden
Log in to view solution →
Q65
PHYSICS
Unit 15: Electromagnetic Waves
A particular station of All India Radio, New Delhi, broadcasts on a frequency of 1,368 kHz (kilohertz). The wavelength of the electromagnetic radiation emitted by the transmitter is : [speed of light, c=3.0×10^8 ms^-1]
↻ Repeated question — also appeared in
2021 (10 sets)
- A. 219.2 m
- B. 2192 m
- C. 21.92 cm
- D. 219.3 m
Correct answer & explanation hidden
Log in to view solution →
Q66
BIOLOGY
Unit 8: Biology and Human Welfare
Which one of the following polymers is prepared by addition polymerisation?
↻ Repeated question — also appeared in
2021 (6 sets)
- A. Nylon-66
- B. Novolac
- C. Dacron
- D. Teflon
Correct answer & explanation hidden
Log in to view solution →
Q67
CHEMISTRY
Unit 5: Solutions
The right option for the statement “Tyndall effect is exhibited by”, is :
↻ Repeated question — also appeared in
2021 (7 sets)
- A. Glucose solution
- B. Starch solution
- C. Urea solution
- D. NaCl solution
Correct answer & explanation hidden
Log in to view solution →
Q68
CHEMISTRY
Unit 5: Solutions
The correct option for the number of body centred unit cells in all 14 types of Bravais lattice unit cells is :
↻ Repeated question — also appeared in
2021 (3 sets)
- A. 5
- B. 2
- C. 3
- D. 7
Correct answer & explanation hidden
Log in to view solution →
Q69
CHEMISTRY
Unit 4: Chemical Thermodynamics
Which one among the following is the correct option for right relationship between CP and CV for one mole of ideal gas ?
↻ Repeated question — also appeared in
2021 (9 sets)
- A. CP - CV = R
- B. CP = RCV
- C. CV = RCP
- D. CP + CV = R
Correct answer & explanation hidden
Log in to view solution →
Q70
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
The compound which shows metamerism is :
↻ Repeated question — also appeared in
2021 (9 sets)
- A. C3H8O
- B. C3H6O
- C. C4H10O
- D. C5H12
Correct answer & explanation hidden
Log in to view solution →
Q71
CHEMISTRY
Unit 15: Hydrocarbons
Dihedral angle of least stable conformer of ethane is :
↻ Repeated question — also appeared in
2021 (7 sets)
- A. 180°
- B. 60°
- C. 0°
- D. 120°
Correct answer & explanation hidden
Log in to view solution →
Q72
CHEMISTRY
Unit 11: d- and f-Block Elements
Zr (Z=40) and Hf (Z=72) have similar atomic and ionic radii because of :
↻ Repeated question — also appeared in
2021 (10 sets)
- A. diagonal relationship
- B. lanthanoid contraction
- C. having similar chemical properties
- D. belonging to same group
Correct answer & explanation hidden
Log in to view solution →
Q73
CHEMISTRY
Unit 16: Organic Compounds Containing Halogens
The correct sequence of bond enthalpy of ‘C–X’ bond is :
↻ Repeated question — also appeared in
2021 (9 sets)
- A. CH3–F > CH3–Cl > CH3–Br > CH3–I
- B. CH3–F < CH3–Cl > CH3–Br > CH3–I
- C. CH3–Cl > CH3–F > CH3–Br > CH3–I
- D. CH3–F < CH3–Cl < CH3–Br < CH3–I
Correct answer & explanation hidden
Log in to view solution →
Q74
CHEMISTRY
Unit 19: Biomolecules
The RBC deficiency is deficiency disease of :
↻ Repeated question — also appeared in
2021 (9 sets)
- A. Vitamin B6
- B. Vitamin B1
- C. Vitamin B2
- D. Vitamin B12
Correct answer & explanation hidden
Log in to view solution →
Q74
BIOLOGY
Unit 5: Human Physiology
The RBC deficiency is deficiency disease of :
↻ Repeated question — also appeared in
2021 (2 sets)
- A. Vitamin B6
- B. Vitamin B1
- C. Vitamin B2
- D. Vitamin B12
Correct answer & explanation hidden
Log in to view solution →
Q76
CHEMISTRY
Unit 10: p-Block Elements
Statement I: Acid strength increases in the order given as HF << HCl << HBr << HI. Statement II: As the size of the elements F, Cl, Br, I increases down the group, the bond strength of HF, HCl, HBr and HI decreases and so the acid strength increases. In the light of the above statements, choose the correct answer from the options given below.
↻ Repeated question — also appeared in
2021 (6 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 →
Q76
CHEMISTRY
Unit 10: p-Block Elements
Statement I : Acid strength increases in the order given as HF << HCl << HBr << HI. Statement II : As the size of the elements F, Cl, Br, I increases down the group, the bond strength of HF, HCl, HBr and HI decreases and so the acid strength increases. In the light of the above statements, choose the correct answer from the options given below.
↻ Repeated question — also appeared in
2021 (6 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 →
Q77
CHEMISTRY
Unit 10: p-Block Elements
The maximum temperature that can be achieved in blast furnace is :
↻ Repeated question — also appeared in
2021 (2 sets)
- A. upto 2200 K
- B. upto 1900 K
- C. upto 5000 K
- D. upto 1200 K
Correct answer & explanation hidden
Log in to view solution →
Q77
CHEMISTRY
Unit 11: d- and f-Block Elements
The maximum temperature that can be achieved in blast furnace is :
↻ Repeated question — also appeared in
2021 (4 sets)
- A. upto 2200 K
- B. upto 1900 K
- C. upto 5000 K
- D. upto 1200 K
Correct answer & explanation hidden
Log in to view solution →
Q78
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Match List - I with List - II. List - I (a) PCl5 (b) SF6 (c) BrF5 (d) BF3 List - II (i) Square pyramidal (ii) Trigonal planar (iii) Octahedral (iv) Trigonal bipyramidal
↻ Repeated question — also appeared in
2021 (3 sets)
- A. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
- B. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
- C. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
- D. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
Correct answer & explanation hidden
Log in to view solution →
Q79
CHEMISTRY
Unit 9: Classification of Elements and Periodicity in Properties
Among the following alkaline earth metal halides, one which is covalent and soluble in organic solvents is :
↻ Repeated question — also appeared in
2021 (3 sets)
- A. Strontium chloride
- B. Magnesium chloride
- C. Beryllium chloride
- D. Calcium chloride
Correct answer & explanation hidden
Log in to view solution →
Q80
CHEMISTRY
Unit 11: d- and f-Block Elements
The incorrect statement among the following is :
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Most of the trivalent Lanthanoid ions are colorless in the solid state.
- B. Lanthanoids are good conductors of heat and electricity.
- C. Actinoids are highly reactive metals, especially when finely divided.
- D. Actinoid contraction is greater for element to element than Lanthanoid contraction.
Correct answer & explanation hidden
Log in to view solution →
Q82
PHYSICS
Unit 7: Properties of Solids and Liquids
Right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell are :
↻ Repeated question — also appeared in
2021 (8 sets)
- A. 6, 12
- B. 2, 1
- C. 12, 6
- D. 8, 4
Correct answer & explanation hidden
Log in to view solution →
Q83
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
The molar conductance of NaCl, HCl and CH3COONa at infinite dilution are 126.45, 426.16 and 91.0 S cm2 mol−1 respectively. The molar conductance of CH3COOH at infinite dilution is. Choose the right option for your answer.
↻ Repeated question — also appeared in
2021 (10 sets)
- A. 390.71 S cm2 mol−1
- B. 698.28 S cm2 mol−1
- C. 540.48 S cm2 mol−1
- D. 201.28 S cm2 mol−1
Correct answer & explanation hidden
Log in to view solution →
Q84
CHEMISTRY
Unit 6: Equilibrium
The pKb of dimethylamine and pKa of acetic acid are 3.27 and 4.77 respectively at T (K). The correct option for the pH of dimethylammonium acetate solution is :
↻ Repeated question — also appeared in
2021 (9 sets)
- A. 5.50
- B. 7.75
- C. 6.25
- D. 8.50
Correct answer & explanation hidden
Log in to view solution →
Q85
CHEMISTRY
Unit 1: Some Basic Concepts in Chemistry
An organic compound contains 78% (by wt.) carbon and remaining percentage of hydrogen. The right option for the empirical formula of this compound is : [Atomic wt. of C is 12, H is 1]
↻ Repeated question — also appeared in
2021 (10 sets)
- A. CH2
- B. CH3
- C. CH4
- D. CH
Correct answer & explanation hidden
Log in to view solution →
Q87
CHEMISTRY
Unit 4: Chemical Thermodynamics
For irreversible expansion of an ideal gas under isothermal condition, the correct option is :
↻ Repeated question — also appeared in
2021 (8 sets)
- A. ∆U ≠ 0, ∆Stotal ≠ 0
- B. ∆U=0, ∆Stotal ≠ 0
- C. ∆U ≠ 0, ∆Stotal=0
- D. ∆U=0, ∆Stotal=0
Correct answer & explanation hidden
Log in to view solution →
Q88
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Which of the following molecules is non-polar in nature ?
↻ Repeated question — also appeared in
2021 (11 sets)
- A. CH2O
- B. SbCl5
- C. NO2
- D. POCl3
Correct answer & explanation hidden
Log in to view solution →
Q88
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Which of the following molecules is non-polar in nature?
↻ Repeated question — also appeared in
2021 (11 sets)
- A. CH2O
- B. SbCl5
- C. NO2
- D. POCl3
Correct answer & explanation hidden
Log in to view solution →
Q89
CHEMISTRY
Unit 10: p-Block Elements
In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it?
↻ Repeated question — also appeared in
2021 (9 sets)
- A. H2O < H2S < H2Se < H2Te : Increasing pKa values
- B. NH3 < PH3 < AsH3 < SbH3 : Increasing acidic character
- C. CO2 < SiO2 < SnO2 < PbO2 : Increasing oxidizing power
- D. HF < HCl < HBr < HI : Increasing acidic strength
Correct answer & explanation hidden
Log in to view solution →
Q90
CHEMISTRY
Unit 8: Chemical Kinetics
The slope of Arrhenius Plot ln k v/s 1/T of first order reaction is -5×10^3 K. The value of Ea of the reaction is. Choose the correct option for your answer. [Given R=8.314 JK^-1 mol^-1]
↻ Repeated question — also appeared in
2021 (2 sets)
- A. 83.0 kJ mol^-1
- B. 166 kJ mol^-1
- C. -83 kJ mol^-1
- D. 41.5 kJ mol^-1
Correct answer & explanation hidden
Log in to view solution →
Q90
CHEMISTRY
Unit 8: Chemical Kinetics
The slope of Arrhenius Plot (ln k vs 1/T) of first order reaction is -5x10^3 K. The value of Ea of the reaction is. [Given R = 8.314 JK^-1 mol^-1]
↻ Repeated question — also appeared in
2021 (8 sets)
- A. 83.0 kJ mol^-1
- B. 166 kJ mol^-1
- C. -83 kJ mol^-1
- D. 41.5 kJ mol^-1
Correct answer & explanation hidden
Log in to view solution →
Q91
BIOLOGY
Unit 10: Ecology and Environment
Match List - I with List - II.
- A. (a) 2SO2(g) + O2(g) -> 2SO3(g) (i) Acid rain; (b) HOCl(g) -> OH + Cl (ii) Smog; (c) CaCO3 + H2SO4 -> CaSO4 + H2O + CO2 (iii) Ozone depletion; (d) NO2(g) -> NO(g) + O(g) (iv) Tropospheric pollution
- B. (1) (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
- C. (2) (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
- D. (3) (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
Correct answer & explanation hidden
Log in to view solution →
Q93
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
The molar conductivity of 0.007 M acetic acid is 20 S cm^2 mol^-1. What is the dissociation constant of acetic acid? [Given: Lambda_H+ = 350 S cm^2 mol^-1, Lambda_CH3COO- = 50 S cm^2 mol^-1]
↻ Repeated question — also appeared in
2021 (7 sets)
- A. 2.50x10^-4 mol L^-1
- B. 1.75x10^-5 mol L^-1
- C. 2.50x10^-5 mol L^-1
- D. 1.75x10^-4 mol L^-1
Correct answer & explanation hidden
Log in to view solution →
Q94
CHEMISTRY
Unit 5: Solutions
The correct option for the value of vapour pressure of a solution at 45°C with benzene to octane in molar ratio 3 : 2 is: [At 45°C vapour pressure of benzene is 280 mm Hg and that of octane is 420 mm Hg. Assume Ideal gas]
↻ Repeated question — also appeared in
2021 (10 sets)
- A. 168 mm of Hg
- B. 336 mm of Hg
- C. 350 mm of Hg
- D. 160 mm of Hg
Correct answer & explanation hidden
Log in to view solution →
Q98
CHEMISTRY
Unit 12: Coordination Compounds
Match List - I with List - II.
↻ Repeated question — also appeared in
2021 (1 set)
- A. (a) [Fe(CN)6]3- (i) 5.92 BM; (b) [Fe(H2O)6]3+ (ii) 0 BM; (c) [Fe(CN)6]4- (iii) 4.90 BM; (d) [Fe(H2O)6]2+ (iv) 1.73 BM
- B. (1) (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
- C. (2) (a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)
- D. (3) (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
Correct answer & explanation hidden
Log in to view solution →
Q99
PHYSICS
Unit 9: Kinetic Theory of Gases
Choose the correct option for the total pressure (in atm.) in a mixture of 4 g O2 and 2 g H2 confined in a total volume of one litre at 0°C is: [Given R=0.082 L atm mol^-1 K^-1, T=273 K]
↻ Repeated question — also appeared in
2021 (8 sets)
- A. 2.602
- B. 25.18
- C. 26.02
- D. 2.518
Correct answer & explanation hidden
Log in to view solution →
Q100
CHEMISTRY
Unit 2: Atomic Structure
From the following pairs of ions which one is not an iso-electronic pair?
↻ Repeated question — also appeared in
2021 (9 sets)
- A. Na+, Mg2+
- B. Mn2+, Fe3+
- C. Fe2+, Mn2+
- D. O2-, F-
Correct answer & explanation hidden
Log in to view solution →
Q101
BIOLOGY
Unit 4: Plant Physiology
The plant hormone used to destroy weeds in a field is:
↻ Repeated question — also appeared in
2021 (10 sets)
- A. NAA
- B. 2, 4-D
- C. IBA
- D. IAA
Correct answer & explanation hidden
Log in to view solution →
Q102
BIOLOGY
Unit 7: Genetics and Evolution
The factor that leads to Founder effect in a population is:
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Genetic recombination
- B. Mutation
- C. Genetic drift
- D. Natural selection
Correct answer & explanation hidden
Log in to view solution →
Q103
BIOLOGY
Unit 4: Plant Physiology
Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called:
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Flexibility
- B. Plasticity
- C. Maturity
- D. Elasticity
Correct answer & explanation hidden
Log in to view solution →
Q104
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Diadelphous stamens are found in:
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Citrus
- B. Pea
- C. China rose and citrus
- D. China rose
Correct answer & explanation hidden
Log in to view solution →
Q105
BIOLOGY
Unit 4: Plant Physiology
The site of perception of light in plants during photoperiodism is:
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Stem
- B. Axillary bud
- C. Leaf
- D. Shoot apex
Correct answer & explanation hidden
Log in to view solution →
Q106
BIOLOGY
Unit 9: Biotechnology and Its Applications
Which of the following is a correct sequence of steps in a PCR (Polymerase Chain Reaction)?
↻ Repeated question — also appeared in
2021 (11 sets)
- A. Denaturation, Extension, Annealing
- B. Extension, Denaturation, Annealing
- C. Annealing, Denaturation, Extension
- D. Denaturation, Annealing, Extension
Correct answer & explanation hidden
Log in to view solution →
Q106
BIOLOGY
Unit 9: Biotechnology and Its Applications
Which of the following is a correct sequence of steps in a PCR (Polymerase Chain Reaction)?
↻ Repeated question — also appeared in
2021 (11 sets)
- A. Denaturation, Extension, Annealing
- B. Extension, Denaturation, Annealing
- C. Annealing, Denaturation, Extension
- D. Denaturation, Annealing, Extension
Correct answer & explanation hidden
Log in to view solution →
Q107
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following stages of meiosis involves division of centromere?
↻ Repeated question — also appeared in
2021 (11 sets)
- A. Metaphase II
- B. Anaphase II
- C. Telophase II
- D. Metaphase I
Correct answer & explanation hidden
Log in to view solution →
Q107
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following stages of meiosis involves division of centromere?
↻ Repeated question — also appeared in
2021 (11 sets)
- A. Metaphase II
- B. Anaphase II
- C. Telophase II
- D. Metaphase I
Correct answer & explanation hidden
Log in to view solution →
Q108
BIOLOGY
Unit 6: Reproduction
A typical angiosperm embryo sac at maturity is:
↻ Repeated question — also appeared in
2021 (11 sets)
- A. 7-nucleate and 8-celled
- B. 7-nucleate and 7-celled
- C. 8-nucleate and 8-celled
- D. 8-nucleate and 7-celled
Correct answer & explanation hidden
Log in to view solution →
Q108
BIOLOGY
Unit 6: Reproduction
A typical angiosperm embryo sac at maturity is:
↻ Repeated question — also appeared in
2021 (11 sets)
- A. 7-nucleate and 8-celled
- B. 7-nucleate and 7-celled
- C. 8-nucleate and 8-celled
- D. 8-nucleate and 7-celled
Correct answer & explanation hidden
Log in to view solution →
Q109
BIOLOGY
Unit 4: Plant Physiology
The first stable product of CO2 fixation in sorghum is:
↻ Repeated question — also appeared in
2021 (11 sets)
- A. Oxaloacetic acid
- B. Succinic acid
- C. Phosphoglyceric acid
- D. Pyruvic acid
Correct answer & explanation hidden
Log in to view solution →
Q109
BIOLOGY
Unit 4: Plant Physiology
The first stable product of CO2 fixation in sorghum is:
↻ Repeated question — also appeared in
2021 (11 sets)
- A. Oxaloacetic acid
- B. Succinic acid
- C. Phosphoglyceric acid
- D. Pyruvic acid
Correct answer & explanation hidden
Log in to view solution →
Q110
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following are not secondary metabolites in plants?
↻ Repeated question — also appeared in
2021 (6 sets)
- A. Amino acids, glucose
- B. Vinblastin, curcumin
- C. Rubber, gums
- D. Morphine, codeine
Correct answer & explanation hidden
Log in to view solution →
Q110
CHEMISTRY
Unit 19: Biomolecules
Which of the following are not secondary metabolites in plants?
↻ Repeated question — also appeared in
2021 (5 sets)
- A. Amino acids, glucose
- B. Vinblastin, curcumin
- C. Rubber, gums
- D. Morphine, codeine
Correct answer & explanation hidden
Log in to view solution →
Q111
BIOLOGY
Unit 1: Diversity in Living World
Which of the following algae contains mannitol as reserve food material?
↻ Repeated question — also appeared in
2021 (11 sets)
- A. Gracilaria
- B. Volvox
- C. Ulothrix
- D. Ectocarpus
Correct answer & explanation hidden
Log in to view solution →
Q111
BIOLOGY
Unit 1: Diversity in Living World
Which of the following algae contains mannitol as reserve food material?
↻ Repeated question — also appeared in
2021 (11 sets)
- A. Gracilaria
- B. Volvox
- C. Ulothrix
- D. Ectocarpus
Correct answer & explanation hidden
Log in to view solution →
Q112
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following is an incorrect statement?
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Microbodies are present both in plant and animal cells.
- B. The perinuclear space forms a barrier between the materials present inside the nucleus and that of the cytoplasm.
- C. Nuclear pores act as passages for proteins and RNA molecules in both directions between nucleus and cytoplasm.
- D. Mature sieve tube elements possess a conspicuous nucleus and usual cytoplasmic organelles.
Correct answer & explanation hidden
Log in to view solution →
Q113
BIOLOGY
Unit 9: Biotechnology and Its Applications
DNA strands on a gel stained with ethidium bromide when viewed under UV radiation, appear as:
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Bright orange bands
- B. Dark red bands
- C. Bright blue bands
- D. Yellow bands
Correct answer & explanation hidden
Log in to view solution →
Q115
BIOLOGY
Unit 1: Diversity in Living World
Which of the following algae produce Carrageen?
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Brown algae
- B. Red algae
- C. Blue-green algae
- D. Green algae
Correct answer & explanation hidden
Log in to view solution →
Q116
BIOLOGY
Unit 10: Ecology and Environment
The amount of nutrients, such as carbon, nitrogen, phosphorus and calcium present in the soil at any given time, is referred as:
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Climax community
- B. Standing state
- C. Standing crop
- D. Climax
Correct answer & explanation hidden
Log in to view solution →
Q119
BIOLOGY
Unit 9: Biotechnology and Its Applications
During the purification process for recombinant DNA technology, addition of chilled ethanol precipitates out:
↻ Repeated question — also appeared in
2021 (10 sets)
- A. DNA
- B. Histones
- C. Polysaccharides
- D. RNA
Correct answer & explanation hidden
Log in to view solution →
Q120
BIOLOGY
Unit 1: Diversity in Living World
Genera like Selaginella and Salvinia produce two kinds of spores. Such plants are known as:
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Heterosorus
- B. Homosporous
- C. Heterosporous
- D. Homosorus
Correct answer & explanation hidden
Log in to view solution →
Q121
BIOLOGY
Unit 1: Diversity in Living World
Gemmae are present in:
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Pteridophytes
- B. Some Gymnosperms
- C. Some Liverworts
- D. Mosses
Correct answer & explanation hidden
Log in to view solution →
Q122
BIOLOGY
Unit 7: Genetics and Evolution
The production of gametes by the parents, formation of zygotes, the F1 and F2 plants, can be understood from a diagram called:
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Punch square
- B. Punnett square
- C. Net square
- D. Bullet square
Correct answer & explanation hidden
Log in to view solution →
Q123
BIOLOGY
Unit 9: Biotechnology and Its Applications
Which of the following is not an application of PCR (Polymerase Chain Reaction)?
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Gene amplification
- B. Purification of isolated protein
- C. Detection of gene mutation
- D. Molecular diagnosis
Correct answer & explanation hidden
Log in to view solution →
Q124
BIOLOGY
Unit 10: Ecology and Environment
Which of the following statements is not correct?
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Pyramid of biomass in sea is generally upright.
- B. Pyramid of energy is always upright.
- C. Pyramid of numbers in a grassland ecosystem is upright.
- D. Pyramid of biomass in sea is generally inverted.
Correct answer & explanation hidden
Log in to view solution →
Q125
BIOLOGY
Unit 6: Reproduction
The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which, during pollination, brings genetically different types of pollen grains to stigma, is:
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Geitonogamy
- B. Chasmogamy
- C. Cleistogamy
- D. Xenogamy
Correct answer & explanation hidden
Log in to view solution →
Q126
BIOLOGY
Unit 4: Plant Physiology
Mutations in plant cells can be induced by:
↻ Repeated question — also appeared in
2021 (5 sets)
- A. Infrared rays
- B. Gamma rays
- C. Zeatin
- D. Kinetin
Correct answer & explanation hidden
Log in to view solution →
Q127
BIOLOGY
Unit 10: Ecology and Environment
Amensalism can be represented as:
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Species A (1) ; Species B (1)
- B. Species A (−) ; Species B (−)
- C. Species A (1) ; Species B (0)
- D. Species A (−) ; Species B (0)
Correct answer & explanation hidden
Log in to view solution →
Q128
BIOLOGY
Unit 3: Cell Structure and Function
When the centromere is situated in the middle of two equal arms of chromosomes, the chromosome is referred as:
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Telocentric
- B. Sub-metacentric
- C. Acrocentric
- D. Metacentric
Correct answer & explanation hidden
Log in to view solution →
Q129
BIOLOGY
Unit 10: Ecology and Environment
In the equation GPP−R=NPP, R represents:
↻ Repeated question — also appeared in
2021 (9 sets)
- A. Retardation factor
- B. Environment factor
- C. Respiration losses
- D. Radiant energy
Correct answer & explanation hidden
Log in to view solution →