Q1
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 (7 sets)
- A. 13/5 t
- B. 10/13 t
- C. 5/13 t
- D. 13/10 t
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Q1
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 (7 sets)
- A. 13t/5
- B. 10t/13
- C. 5t/13
- D. 13t/10
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Q2
PHYSICS
Unit 11: Electrostatics
Polar molecules are the molecules :
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2021 (12 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.
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Q2
PHYSICS
Unit 11: Electrostatics
Polar molecules are the molecules:
↻ Repeated question — also appeared in
2021 (12 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.
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Q3
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 (12 sets)
- A. 9.4 MeV
- B. 804 MeV
- C. 216 MeV
- D. 0.9 MeV
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Q3
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 (12 sets)
- A. 9.4 MeV
- B. 804 MeV
- C. 216 MeV
- D. 0.9 MeV
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Q4
PHYSICS
Unit 17: Dual Nature of Matter and Radiation
An electromagnetic wave of wavelength ‘λ’ is incident on a photosensitive surface of negligible work function. If ‘m’ mass is of photoelectron emitted from the surface has de-Broglie wavelength λ_d, then :
↻ Repeated question — also appeared in
2021 (3 sets)
- A. λ = (2mc/h) * λ_d^2
- B. λ_d = (2mc/h) * λ^2
- C. λ_d = (2h/mc) * λ^2
- D. λ_d = (2m/hc) * λ^2
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Q5
PHYSICS
Unit 18: Atoms and Nuclei
A radioactive nucleus X(A, Z) undergoes spontaneous decay in the sequence X(A,Z) -> B(A, Z-1) -> C(A-4, Z-3) -> D(A-4, Z-2), 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+
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Q6
PHYSICS
Unit 12: Current Electricity
Match Column - I with Column - II for physical terms associated with current flow.
- 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)
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Q7
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?
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2021 (10 sets)
- A. 21.6 cm
- B. 64 cm
- C. 62 cm
- D. 60 cm
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Q8
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:
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2021 (9 sets)
- A. Mg
- B. 3Mg/2
- C. 2Mg
- D. Mg/2
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Q9
PHYSICS
Unit 16: Optics
A lens of large focal length and large aperture is best suited as an objective of an astronomical telescope since:
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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.
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Q10
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. R2^2/R1^2
- D. R1/R2
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Q11
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
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Q12
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 (11 sets)
- A. 0.5 Ω
- B. 1 Ω
- C. 4 Ω
- D. 0.25 Ω
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Q14
PHYSICS
Unit 6: Gravitation
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:
↻ Repeated question — also appeared in
2021 (2 sets)
- A. S/4, sqrt(3gS/2)
- B. S/2, sqrt(3gS/2)
- C. S/4, sqrt(3gS)
- D. S/4, sqrt(3gS/2)
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Q14
PHYSICS
Unit 6: Gravitation
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 the earth and the speed of the particle at that instant are respectively:
↻ Repeated question — also appeared in
2021 (2 sets)
- A. S/4, 3gS/2
- B. S/2, 3gS/2
- C. S/4, sqrt(3gS)/2
- D. S/4, sqrt(3gS)/2
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Q15
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
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Q15
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
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Q17
PHYSICS
Unit 11: Electrostatics
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 = V0ωC sin(ωt)
- D. Id = V0ωC cos(ωt)
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Q19
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.
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2021 (11 sets)
- A. [F] [A] [T^2]
- B. [F] [A] [T^-1]
- C. [F] [A^-1] [T]
- D. [F] [A] [T]
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Q21
PHYSICS
Unit 10: Oscillations and Waves
A body is executing simple harmonic motion with frequency ‘n’, the frequency of its potential energy is:
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2021 (11 sets)
- A. 2n
- B. 3n
- C. 4n
- D. n
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Q23
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 electric field 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.
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Q24
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*sqrt(2))
- B. 2/3
- C. 2/(3*sqrt(2))
- D. 1/2
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Q25
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
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Q27
PHYSICS
Unit 15: Electromagnetic Waves
For a plane electromagnetic wave propagating in x-direction, which one of the following combinations gives the correct possible directions for electric field (E) and magnetic field (B) respectively?
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2021 (2 sets)
- A. -j + k, j + k
- B. +j - k, -j + k
- C. -j + k, -j + k
- D. +j + k, j + k
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Q28
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 (11 sets)
- A. ε0EAd
- B. 1/2 ε0 E^2 Ad
- C. E^2 Ad / ε0
- D. 1/2 ε0 E^2
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Q29
PHYSICS
Unit 19: Electronic Devices
Consider the following statements (A) and (B) and identify the correct answer: (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 (12 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.
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Q29
PHYSICS
Unit 19: Electronic Devices
Consider the following statements (A) and (B) and identify the correct answer. (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 (12 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.
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Q30
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
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Q32
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
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Q33
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 (8 sets)
- A. (2n-1)/(2n+1)
- B. (2n+1)/(2n-1)
- C. 2n/(2n-1)
- D. (2n-1)/2n
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Q34
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:
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2021 (11 sets)
- A. 2 v
- B. 3 v
- C. 4 v
- D. v
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Q35
PHYSICS
Unit 6: Gravitation
If E and G respectively denote energy and gravitational constant, then E/G has the dimensions of:
- 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]
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Q40
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
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Q41
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 (5 sets)
- A. R1/R2
- B. R1^2/R2
- C. R2^2/R1
- D. R1/R2^2
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Q41
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 (5 sets)
- A. R1/R2
- B. R1^2/R2
- C. R2^2/R1
- D. R1/R2^2
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Q43
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
In the product F = q(v x B). For q=1 and v = 2i + 4j + 6k and F = 4i - 20j + 12k. What will be the complete expression for B?
↻ Repeated question — also appeared in
2021 (2 sets)
- A. 6i - 6j - 8k
- B. 8i + 8j - 6k
- C. 6i + 6j - 8k
- D. 8i - 8j - 6k
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Q44
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 potential.
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2021 (12 sets)
- A. 1320 V
- B. 1520 V
- C. 1980 V
- D. 660 V
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Q44
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 (12 sets)
- A. 1320 V
- B. 1520 V
- C. 1980 V
- D. 660 V
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Q45
PHYSICS
Unit 4: Work Energy and Power
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 (2 sets)
- A. 4.2 kg m/s
- B. 2.1 kg m/s
- C. 1.4 kg m/s
- D. 0 kg m/s
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Q46
PHYSICS
Unit 2: Kinematics
A car starts from rest and accelerates at 5 m/s^2. 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/s^2)
↻ Repeated question — also appeared in
2021 (8 sets)
- A. 20 m/s, 0
- B. 20√2 m/s, 0
- C. 20√2 m/s, 10 m/s^2
- D. 20 m/s, 5 m/s^2
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Q48
PHYSICS
Unit 5: Rotational Motion
From a circular ring of mass ‘M’ and radius ‘R’ an arc corresponding to a 90° sector is removed. The moment of inertia of the remaining part of the ring about an axis passing through the centre of the ring and perpendicular to the plane of the ring is ‘K’ times ‘MR^2’. Then the value of ‘K’ is:
↻ Repeated question — also appeared in
2021 (6 sets)
- A. 7/8
- B. 1/4
- C. 1/8
- D. 3/4
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Q51
CHEMISTRY
Unit 20: Principles Related to Practical Chemistry
Which one of the following methods can be used to obtain highly pure metal which is liquid at room temperature?
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2021 (1 set)
- A. Chromatography
- B. Distillation
- C. Zone refining
- D. Electrolysis
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Q52
CHEMISTRY
Unit 11: d- and f-Block Elements
The incorrect statement among the following is:
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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.
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Q54
CHEMISTRY
Unit 16: Organic Compounds Containing Halogens
The correct sequence of bond enthalpy of ‘C–X’ bond is:
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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
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Q55
CHEMISTRY
Unit 11: d- and f-Block Elements
Zr (Z=40) and Hf (Z=72) have similar atomic and ionic radii because of:
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2021 (11 sets)
- A. diagonal relationship
- B. lanthanoid contraction
- C. having similar chemical properties
- D. belonging to same group
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Q55
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 (11 sets)
- A. diagonal relationship
- B. lanthanoid contraction
- C. having similar chemical properties
- D. belonging to same group
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Q56
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]
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2021 (10 sets)
- A. 219.2 m
- B. 2192 m
- C. 21.92 cm
- D. 219.3 m
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Q56
CHEMISTRY
Unit 2: Atomic Structure
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]
- A. 219.2 m
- B. 2192 m
- C. 21.92 cm
- D. 219.3 m
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Q58
CHEMISTRY
Unit 19: Biomolecules
Which one of the following polymers is prepared by addition polymerisation?
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2021 (4 sets)
- A. Nylon-66
- B. Novolac
- C. Dacron
- D. Teflon
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Q58
CHEMISTRY
Unit 19: Biomolecules
Which one of the following polymers is prepared by addition polymerisation?
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2021 (4 sets)
- A. Nylon-66
- B. Novolac
- C. Dacron
- D. Teflon
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Q59
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
The compound which shows metamerism is:
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- A. C3H8O
- B. C3H6O
- C. C4H10O
- D. C5H12
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Q60
CHEMISTRY
Unit 10: p-Block Elements
Among the following alkaline earth metal halides, one which is covalent and soluble in organic solvents is:
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2021 (6 sets)
- A. Strontium chloride
- B. Magnesium chloride
- C. Beryllium chloride
- D. Calcium chloride
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Q61
CHEMISTRY
Unit 10: p-Block Elements
Noble gases are named because of their inertness towards reactivity. Identify an incorrect statement about them.
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2021 (10 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.
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Q63
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Match List - I with List - II: (a)PCl5 (i)Square pyramidal, (b)SF6 (ii)Trigonal planar, (c)BrF5 (iii)Octahedral, (d)BF3 (iv)Trigonal bipyramidal.
↻ Repeated question — also appeared in
2021 (1 set)
- 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)
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Q65
CHEMISTRY
Unit 20: Principles Related to Practical Chemistry
The maximum temperature that can be achieved in blast furnace is :
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- A. upto 2200 K
- B. upto 1900 K
- C. upto 5000 K
- D. upto 1200 K
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Q66
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:
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2021 (9 sets)
- A. 5.50
- B. 7.75
- C. 6.25
- D. 8.50
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Q68
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 cm^2 mol^-1 respectively. The molar conductance of CH3COOH at infinite dilution is.
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2021 (10 sets)
- A. 390.71 S cm^2 mol^-1
- B. 698.28 S cm^2 mol^-1
- C. 540.48 S cm^2 mol^-1
- D. 201.28 S cm^2 mol^-1
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Q69
PHYSICS
Unit 18: Atoms and Nuclei
Tritium, a radioactive isotope of hydrogen, emits which of the following particles?
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- A. Alpha (α)
- B. Gamma (γ)
- C. Neutron (n)
- D. Beta (β-)
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Q70
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
Which of the following reactions is the metal displacement reaction?
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- A. Cr2O3 + 2Al -> Al2O3 + 2Cr
- B. Fe + 2HCl -> FeCl2 + H2
- C. 2Pb(NO3)2 -> 2PbO + 4NO2 + O2
- D. 2KClO3 -> 2KCl + 3O2
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Q71
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.
↻ Repeated question — also appeared in
2021 (2 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.
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Q72
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:
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- A. sp3 and 6
- B. sp2 and 6
- C. sp2 and 8
- D. sp3 and 4
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Q72
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
BF3 is a planar and electron-deficient compound. Hybridization and number of electrons around the central atom, respectively, are:
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2021 (11 sets)
- A. sp3 and 6
- B. sp2 and 6
- C. sp2 and 8
- D. sp3 and 4
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Q73
CHEMISTRY
Unit 15: Hydrocarbons
Dihedral angle of least stable conformer of ethane is:
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- A. 180
- B. 60
- D. 120
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Q73
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
Dihedral angle of the least stable conformer of ethane is:
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2021 (4 sets)
- A. 180°
- B. 60°
- C. 0°
- D. 120°
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Q75
CHEMISTRY
Unit 5: Solutions
The right option for the statement “Tyndall effect is exhibited by”, is:
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- A. Glucose solution
- B. Starch solution
- C. Urea solution
- D. NaCl solution
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Q75
CHEMISTRY
Unit 5: Solutions
The right option for the statement “Tyndall effect is exhibited by” is:
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- A. Glucose solution
- B. Starch solution
- C. Urea solution
- D. NaCl solution
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Q76
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:
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2021 (9 sets)
- A. P1 > P2 > P3
- B. P2 > P3 > P1
- C. P3 > P1 > P2
- D. P2 > P1 > P3
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Q77
PHYSICS
Unit 7: Properties of Solids and Liquids
The correct option for the number of body centred unit cells in all 14 types of Bravais lattice unit cells is:
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2021 (7 sets)
- A. 5
- B. 2
- C. 3
- D. 7
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Q78
CHEMISTRY
Unit 19: Biomolecules
The RBC deficiency is a deficiency disease of:
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- A. Vitamin B6
- B. Vitamin B1
- C. Vitamin B2
- D. Vitamin B12
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Q80
PHYSICS
Unit 8: Thermodynamics
Which one among the following is the correct option for the right relationship between CP and CV for one mole of ideal gas?
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- A. CP - CV = R
- B. CP = RCV
- C. CV = RCP
- D. CP / CV = R
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Q81
CHEMISTRY
Unit 12: Coordination Compounds
Ethylene diaminetetraacetate (EDTA) ion is:
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- 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
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Q82
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.
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- 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.
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Q83
CHEMISTRY
Unit 10: p-Block Elements
The structures of beryllium chloride in solid state and vapour phase, are:
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- A. Linear in both
- B. Dimer and Linear, respectively
- C. Chain in both
- D. Chain and dimer, respectively
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Q84
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]
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- A. CH2
- B. CH3
- C. CH4
- D. CH
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Q85
PHYSICS
Unit 7: Properties of Solids and Liquids
Right option for the number of tetrahedral and octahedral voids in a hexagonal primitive unit cell are:
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- A. 6, 12
- B. 2, 1
- C. 12, 6
- D. 8, 4
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Q86
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?
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- 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
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Q90
CHEMISTRY
Unit 2: Atomic Structure
From the following pairs of ions which one is not an iso-electronic pair?
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- A. Na+, Mg2+
- B. Mn2+, Fe3+
- C. Fe2+, Mn2+
- D. O2-, F-
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Q90
CHEMISTRY
Unit 9: Classification of Elements and Periodicity in Properties
From the following pairs of ions which one is not an iso-electronic pair?
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- A. Na+, Mg2+
- B. Mn2+, Fe3+
- C. Fe2+, Mn2+
- D. O2-, F-
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Q91
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:
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2021 (9 sets)
- A. 2.602
- B. 25.18
- C. 26.02
- D. 2.518
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Q91
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. [Given R=0.082 L atm mol⁻¹ K⁻¹, T=273 K]
↻ Repeated question — also appeared in
2021 (9 sets)
- A. 2.602
- B. 25.18
- C. 26.02
- D. 2.518
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Q93
CHEMISTRY
Unit 8: Chemical Kinetics
The slope of Arrhenius Plot (ln k v/s 1/T) of a 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 J K−1 mol−1]
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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
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Q93
CHEMISTRY
Unit 8: Chemical Kinetics
The slope of Arrhenius Plot ln k v/s 1/T of first order reaction is -5×10³ 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
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Q94
BIOLOGY
Unit 10: Ecology and Environment
Match List - I with List - II: (a) 2SO2(g) + O2(g) → 2SO3(g), (b) HOCl(g) → OH + Cl, (c) CaCO3 + H2SO4 → CaSO4 + H2O + CO2, (d) NO2(g) → NO(g) + O(g). List - II: (i) Acid rain, (ii) Smog, (iii) Ozone depletion, (iv) Tropospheric pollution.
- A. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
- B. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
- C. (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
- D. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
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Q95
CHEMISTRY
Unit 15: Hydrocarbons
Consider the reaction: CH3CH2COO⁻Na⁺ + NaOH (Heat/?) → CH3CH3 + Na2CO3. Identify the missing reagent.
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- A. Red Phosphorus
- B. CaO
- C. DIBAL-H
- D. B2H6
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Q96
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Which of the following molecules is non-polar in nature?
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- A. CH2O
- B. SbCl5
- C. NO2
- D. POCl3
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Q97
CHEMISTRY
Unit 4: Chemical Thermodynamics
For irreversible expansion of an ideal gas under isothermal condition, the correct option is:
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- A. ΔU ≠ 0, ΔStotal ≠ 0
- B. ΔU=0, ΔStotal ≠ 0
- C. ΔU ≠ 0, ΔStotal=0
- D. ΔU=0, ΔStotal=0
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Q98
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]
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- A. 168 mm of Hg
- B. 336 mm of Hg
- C. 350 mm of Hg
- D. 160 mm of Hg
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Q99
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
The molar conductivity of 0.007 M acetic acid is 20 S cm² mol⁻¹. What is the dissociation constant of acetic acid? Given Λ°_H+ = 350 S cm² mol⁻¹, Λ°_CH3COO- = 50 S cm² mol⁻¹.
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2021 (7 sets)
- A. 2.50×10⁻⁴ mol L⁻¹
- B. 1.75×10⁻⁵ mol L⁻¹
- C. 2.50×10⁻⁵ mol L⁻¹
- D. 1.75×10⁻⁴ mol L⁻¹
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Q100
CHEMISTRY
Unit 12: Coordination Compounds
Match List - I with List - II: (a) [Fe(CN)6]³⁻, (b) [Fe(H2O)6]³⁺, (c) [Fe(CN)6]⁴⁻, (d) [Fe(H2O)6]²⁺. List - II: Magnetic moments in BM: (i) 5.92, (ii) 0, (iii) 4.90, (iv) 1.73.
- A. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
- B. (a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)
- C. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
- D. (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)
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Q101
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:
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- A. Flexibility
- B. Plasticity
- C. Maturity
- D. Elasticity
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Q102
BIOLOGY
Unit 10: Ecology and Environment
Inspite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival?
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- A. Competitive release
- B. Mutualism
- C. Predation
- D. Resource partitioning
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Q103
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following stages of meiosis involves division of centromere?
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- A. Metaphase II
- B. Anaphase II
- C. Telophase II
- D. Metaphase I
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Q104
BIOLOGY
Unit 1: Diversity in Living World
Genera like Selaginella and Salvinia produce two kinds of spores. Such plants are known as:
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- A. Heterosorus
- B. Homosporous
- C. Heterosporous
- D. Homosorus
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Q105
BIOLOGY
Unit 9: Biotechnology and Its Applications
DNA strands on a gel stained with ethidium bromide when viewed under UV radiation, appear as:
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2021 (11 sets)
- A. Bright orange bands
- B. Dark red bands
- C. Bright blue bands
- D. Yellow bands
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Q105
BIOLOGY
Unit 9: Biotechnology and Its Applications
DNA strands on a gel stained with ethidium bromide when viewed under UV radiation, appear as :
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2021 (11 sets)
- A. Bright orange bands
- B. Dark red bands
- C. Bright blue bands
- D. Yellow bands
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Q106
BIOLOGY
Unit 7: Genetics and Evolution
Mutations in plant cells can be induced by:
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- A. Infrared rays
- B. Gamma rays
- C. Zeatin
- D. Kinetin
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Q106
BIOLOGY
Unit 7: Genetics and Evolution
Mutations in plant cells can be induced by :
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2021 (5 sets)
- A. Infrared rays
- B. Gamma rays
- C. Zeatin
- D. Kinetin
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Q107
BIOLOGY
Unit 9: Biotechnology and Its Applications
When gene targetting involving gene amplification is attempted in an individual’s tissue to treat disease, it is known as:
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- A. Gene therapy
- B. Molecular diagnosis
- C. Safety testing
- D. Biopiracy
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Q107
BIOLOGY
Unit 9: Biotechnology and Its Applications
When gene targetting involving gene amplification is attempted in an individual’s tissue to treat disease, it is known as :
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2021 (10 sets)
- A. Gene therapy
- B. Molecular diagnosis
- C. Safety testing
- D. Biopiracy
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Q108
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:
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- A. Telocentric
- B. Sub-metacentric
- C. Acrocentric
- D. Metacentric
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Q108
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 :
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2021 (11 sets)
- A. Telocentric
- B. Sub-metacentric
- C. Acrocentric
- D. Metacentric
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Q109
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Match List - I with List - II regarding plant anatomy.
- A. Lenticels (iii), Cork cambium (i), Secondary cortex (iv), Cork (ii)
- B. Lenticels (ii), Cork cambium (iii), Secondary cortex (iv), Cork (i)
- C. Lenticels (iv), Cork cambium (ii), Secondary cortex (i), Cork (iii)
- D. Lenticels (iv), Cork cambium (i), Secondary cortex (iii), Cork (ii)
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Q110
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following is an incorrect statement ?
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- 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.
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Q111
BIOLOGY
Unit 1: Diversity in Living World
Gemmae are present in :
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- A. Pteridophytes
- B. Some Gymnosperms
- C. Some Liverworts
- D. Mosses
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Q112
BIOLOGY
Unit 6: Reproduction
Which of the following plants is monoecious ?
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- A. Chara
- B. Marchantia polymorpha
- C. Cycas circinalis
- D. Carica papaya
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Q113
BIOLOGY
Unit 9: Biotechnology and Its Applications
Which of the following is not an application of PCR (Polymerase Chain Reaction) ?
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- A. Gene amplification
- B. Purification of isolated protein
- C. Detection of gene mutation
- D. Molecular diagnosis
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Q114
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 :
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- A. Punch square
- B. Punnett square
- C. Net square
- D. Bullet square
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Q115
BIOLOGY
Unit 6: Reproduction
A typical angiosperm embryo sac at maturity is :
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- A. 7-nucleate and 8-celled
- B. 7-nucleate and 7-celled
- C. 8-nucleate and 8-celled
- D. 8-nucleate and 7-celled
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Q116
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 :
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- A. Geitonogamy
- B. Chasmogamy
- C. Cleistogamy
- D. Xenogamy
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Q117
BIOLOGY
Unit 7: Genetics and Evolution
The factor that leads to Founder effect in a population is :
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- A. Genetic recombination
- B. Mutation
- C. Genetic drift
- D. Natural selection
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Q118
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following are not secondary metabolites in plants ?
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- A. Amino acids, glucose
- B. Vinblastin, curcumin
- C. Rubber, gums
- D. Morphine, codeine
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Q119
BIOLOGY
Unit 4: Plant Physiology
The plant hormone used to destroy weeds in a field is :
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- A. NAA
- B. 2, 4-D
- C. IBA
- D. IAA
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Q120
BIOLOGY
Unit 10: Ecology and Environment
Amensalism can be represented as :
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- A. Species A (+) ; Species B (+)
- B. Species A (-) ; Species B (-)
- C. Species A (+) ; Species B (0)
- D. Species A (-) ; Species B (0)
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Q121
BIOLOGY
Unit 1: Diversity in Living World
Which of the following algae contains mannitol as reserve food material ?
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- A. Gracilaria
- B. Volvox
- C. Ulothrix
- D. Ectocarpus
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Q122
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 :
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- A. Climax community
- B. Standing state
- C. Standing crop
- D. Climax
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Q123
BIOLOGY
Unit 1: Diversity in Living World
Which of the following algae produce Carrageen ?
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- A. Brown algae
- B. Red algae
- C. Blue-green algae
- D. Green algae
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Q124
BIOLOGY
Unit 10: Ecology and Environment
In the equation GPP−R=NPP, R represents :
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- A. Retardation factor
- B. Environment factor
- C. Respiration losses
- D. Radiant energy
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Q125
BIOLOGY
Unit 4: Plant Physiology
The site of perception of light in plants during photoperiodism is :
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- A. Stem
- B. Axillary bud
- C. Leaf
- D. Shoot apex
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Q126
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Diadelphous stamens are found in :
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- A. Citrus
- B. Pea
- C. China rose and citrus
- D. China rose
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Q126
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Diadelphous stamens are found in :
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- A. Citrus
- B. Pea
- C. China rose and citrus
- D. China rose
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Q127
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Match List - I with List - II regarding tissue classification.
- A. Cells with active cell division capacity (ii), Tissue having all cells similar in structure and function (iv), Tissue having different types of cells (i), Dead cells with highly thickened walls and narrow lumen (iii)
- B. Cells with active cell division capacity (i), Tissue having all cells similar in structure and function (ii), Tissue having different types of cells (iii), Dead cells with highly thickened walls and narrow lumen (iv)
- C. Cells with active cell division capacity (iii), Tissue having all cells similar in structure and function (ii), Tissue having different types of cells (iv), Dead cells with highly thickened walls and narrow lumen (i)
- D. Cells with active cell division capacity (ii), Tissue having all cells similar in structure and function (iv), Tissue having different types of cells (iii), Dead cells with highly thickened walls and narrow lumen (i)
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Q127
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Match List - I with List - II.
(a) Cells with active cell division capacity (i) Vascular tissues
(b) Tissue having all cells similar in structure and function (ii) Meristematic tissue
(c) Tissue having different types of cells (iii) Sclereids
(d) Dead cells with highly thickened walls and narrow lumen (iv) Simple tissue
↻ Repeated question — also appeared in
2021 (2 sets)
- A. (1)(iv)(iii)(ii)(i)
- B. (2)(i)(ii)(iii)(iv)
- C. (3)(iii)(ii)(iv)(i)
- D. (4)(ii)(iv)(i)(iii)
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Q128
BIOLOGY
Unit 3: Cell Structure and Function
Match List - I with List - II regarding cellular organelles.
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2021 (2 sets)
- A. Cristae (i), Thylakoids (iv), Centromere (iii), Cisternae (ii)
- B. Cristae (iii), Thylakoids (iv), Centromere (i), Cisternae (ii)
- C. Cristae (ii), Thylakoids (iii), Centromere (iv), Cisternae (i)
- D. Cristae (iv), Thylakoids (iii), Centromere (ii), Cisternae (i)
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Q128
BIOLOGY
Unit 3: Cell Structure and Function
Match List - I with List - II.
(a) Cristae (i) Primary constriction in chromosome
(b) Thylakoids (ii) Disc-shaped sacs in Golgi apparatus
(c) Centromere (iii) Infoldings in mitochondria
(d) Cisternae (iv) Flattened membranous sacs in stroma of plastids
↻ Repeated question — also appeared in
2021 (3 sets)
- A. (1)(i)(iv)(iii)(ii)
- B. (2)(iii)(iv)(i)(ii)
- C. (3)(ii)(iii)(iv)(i)
- D. (4)(iv)(iii)(ii)(i)
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Q129
BIOLOGY
Unit 10: Ecology and Environment
Which of the following statements is not correct?
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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.
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Q131
BIOLOGY
Unit 4: Plant Physiology
The first stable product of CO2 fixation in sorghum is :
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2021 (10 sets)
- A. Oxaloacetic acid
- B. Succinic acid
- C. Phosphoglyceric acid
- D. Pyruvic acid
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Q132
BIOLOGY
Unit 9: Biotechnology and Its Applications
Match List - I with List - II.
(a) Protoplast fusion (i) Totipotency
(b) Plant tissue culture (ii) Pomato
(c) Meristem culture (iii) Somaclones
(d) Micropropagation (iv) Virus free plants
↻ Repeated question — also appeared in
2021 (5 sets)
- A. (1)(ii)(i)(iv)(iii)
- B. (2)(iii)(iv)(i)(ii)
- C. (3)(iv)(iii)(ii)(i)
- D. (4)(iii)(iv)(ii)(i)
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Q133
BIOLOGY
Unit 9: Biotechnology and Its Applications
During the purification process for recombinant DNA technology, addition of chilled ethanol precipitates out :
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2021 (10 sets)
- A. DNA
- B. Histones
- C. Polysaccharides
- D. RNA
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Q134
BIOLOGY
Unit 9: Biotechnology and Its Applications
Which of the following is a correct sequence of steps in a PCR (Polymerase Chain Reaction) ?
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2021 (10 sets)
- A. Denaturation, Extension, Annealing
- B. Extension, Denaturation, Annealing
- C. Annealing, Denaturation, Extension
- D. Denaturation, Annealing, Extension
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Q135
BIOLOGY
Unit 4: Plant Physiology
Match List - I with List - II.
(a) Cohesion (i) More attraction in liquid phase
(b) Adhesion (ii) Mutual attraction among water molecules
(c) Surface tension (iii) Water loss in liquid phase
(d) Guttation (iv) Attraction towards polar surfaces
↻ Repeated question — also appeared in
2021 (5 sets)
- A. (1)(iv)(iii)(ii)(i)
- B. (2)(iii)(i)(iv)(ii)
- C. (3)(ii)(i)(iv)(iii)
- D. (4)(ii)(iv)(i)(iii)
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Q136
BIOLOGY
Unit 7: Genetics and Evolution
DNA fingerprinting involves identifying differences in some specific regions in DNA sequence, called as :
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- A. Repetitive DNA
- B. Single nucleotides
- C. Polymorphic DNA
- D. Satellite DNA
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Q137
BIOLOGY
Unit 4: Plant Physiology
Which of the following statements is incorrect ?
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2021 (10 sets)
- A. In ETC (Electron Transport Chain), one molecule of NADH gives rise to 2 ATP molecules, and one FADH2 gives rise to 3 ATP molecules.
- B. ATP is synthesized through complex V.
- C. Oxidation-reduction reactions produce proton gradient in respiration.
- D. During aerobic respiration, role of oxygen is limited to the terminal stage.
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Q138
BIOLOGY
Unit 9: Biotechnology and Its Applications
Plasmid pBR322 has PstI restriction enzyme site within gene ampR that confers ampicillin resistance. If this enzyme is used for inserting a gene for β-galactoside production and the recombinant plasmid is inserted in an E.coli strain :
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2021 (9 sets)
- A. the transformed cells will have the ability to resist ampicillin as well as produce β-galactoside.
- B. it will lead to lysis of host cell.
- C. it will be able to produce a novel protein with dual ability.
- D. it will not be able to confer ampicillin resistance to the host cell.
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Q139
BIOLOGY
Unit 6: Reproduction
In some members of which of the following pairs of families, pollen grains retain their viability for months after release ?
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- A. Poaceae ; Leguminosae
- B. Poaceae ; Solanaceae
- C. Rosaceae ; Leguminosae
- D. Poaceae ; Rosaceae
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Q139
BIOLOGY
Unit 6: Reproduction
In some members of which of the following pairs of families, pollen grains retain their viability for months after release?
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2021 (9 sets)
- A. Poaceae ; Leguminosae
- B. Poaceae ; Solanaceae
- C. Rosaceae ; Leguminosae
- D. Poaceae ; Rosaceae
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Q140
BIOLOGY
Unit 1: Diversity in Living World
Which of the following statements is correct ?
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- A. Fusion of protoplasms between two motile or non-motile gametes is called plasmogamy.
- B. Organisms that depend on living plants are called saprophytes.
- C. Some of the organisms can fix atmospheric nitrogen in specialized cells called sheath cells.
- D. Fusion of two cells is called Karyogamy.
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Q140
BIOLOGY
Unit 1: Diversity in Living World
Which of the following statements is correct?
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2021 (8 sets)
- A. Fusion of protoplasms between two motile or non-motile gametes is called plasmogamy.
- B. Organisms that depend on living plants are called saprophytes.
- C. Some of the organisms can fix atmospheric nitrogen in specialized cells called sheath cells.
- D. Fusion of two cells is called Karyogamy.
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Q141
BIOLOGY
Unit 7: Genetics and Evolution
Identify the correct statement.
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2021 (10 sets)
- A. RNA polymerase binds with Rho factor to terminate the process of transcription in bacteria.
- B. The coding strand in a transcription unit is copied to an mRNA.
- C. Split gene arrangement is characteristic of prokaryotes.
- D. In capping, methyl guanosine triphosphate is added to the 3' end of hnRNA.
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Q141
BIOLOGY
Unit 7: Genetics and Evolution
Identify the correct statement.
↻ Repeated question — also appeared in
2021 (10 sets)
- A. RNA polymerase binds with Rho factor to terminate the process of transcription in bacteria.
- B. The coding strand in a transcription unit is copied to an mRNA.
- C. Split gene arrangement is characteristic of prokaryotes.
- D. In capping, methyl guanosine triphosphate is added to the 3' end of hnRNA.
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Q142
BIOLOGY
Unit 3: Cell Structure and Function
Match List - I with List - II regarding cell cycle phases.
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- A. (a) S phase (i) Proteins are synthesized, (b) G2 phase (ii) Inactive phase, (c) Quiescent stage (iii) Interval between mitosis and initiation of DNA replication, (d) G1 phase (iv) DNA replication
- B. (1) (iv)(ii)(iii)(i), (2) (iv)(i)(ii)(iii), (3) (ii)(iv)(iii)(i), (4) (iii)(ii)(i)(iv)
- C. Not applicable - structure is a matrix match.
- D. Not applicable - structure is a matrix match.
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Q143
CHEMISTRY
Unit 19: Biomolecules
Match List - I (Biomolecules) with List - II (Bonds).
- A. (a) Protein (i) C=C double bonds, (b) Unsaturated fatty acid (ii) Phosphodiester bonds, (c) Nucleic acid (iii) Glycosidic bonds, (d) Polysaccharide (iv) Peptide bonds
- B. (1) (i)(iv)(iii)(ii), (2) (ii)(i)(iv)(iii), (3) (iv)(iii)(i)(ii), (4) (iv)(i)(ii)(iii)
- C. Not applicable.
- D. Not applicable.
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Q144
BIOLOGY
Unit 9: Biotechnology and Its Applications
Now a days it is possible to detect the mutated gene causing cancer by allowing radioactive probe to hybridise its complimentary DNA in a clone of cells, followed by its detection using autoradiography because :
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2021 (6 sets)
- A. mutated gene completely and clearly appears on a photographic film.
- B. mutated gene does not appear on a photographic film as the probe has no complimentarity with it.
- C. mutated gene does not appear on photographic film as the probe has complimentarity with it.
- D. mutated gene partially appears on a photographic film.
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Q145
BIOLOGY
Unit 10: Ecology and Environment
In the exponential growth equation Nt = Noert, e represents :
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2021 (9 sets)
- A. The base of exponential logarithms
- B. The base of natural logarithms
- C. The base of geometric logarithms
- D. The base of number logarithms
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Q146
BIOLOGY
Unit 4: Plant Physiology
Which of the following statements is incorrect?
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2021 (10 sets)
- A. Stroma lamellae have PS I only and lack NADP reductase.
- B. Grana lamellae have both PS I and PS II.
- C. Cyclic photophosphorylation involves both PS I and PS II.
- D. Both ATP and NADPH + H+ are synthesized during non-cyclic photophosphorylation.
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Q147
BIOLOGY
Unit 10: Ecology and Environment
Match Column - I with Column - II regarding nitrogen cycle.
- A. (a) Nitrococcus (i) Denitrification, (b) Rhizobium (ii) Conversion of ammonia to nitrite, (c) Thiobacillus (iii) Conversion of nitrite to nitrate, (d) Nitrobacter (iv) Conversion of atmospheric nitrogen to ammonia
- B. (1) (i)(ii)(iii)(iv), (2) (iii)(i)(iv)(ii), (3) (iv)(iii)(ii)(i), (4) (ii)(iv)(i)(iii)
- C. Not applicable.
- D. Not applicable.
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Q148
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Select the correct pair.
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2021 (5 sets)
- A. In dicot leaves, vascular bundles are surrounded by large thick-walled cells - Conjunctive tissue
- B. Cells of medullary rays that form part of cambial ring - Interfascicular cambium
- C. Loose parenchyma cells rupturing the epidermis and forming a lens-shaped opening in bark - Spongy parenchyma
- D. Large colorless empty cells in the epidermis of grass leaves - Subsidiary cells
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Q150
BIOLOGY
Unit 7: Genetics and Evolution
What is the role of RNA polymerase III in the process of transcription in eukaryotes ?
↻ Repeated question — also appeared in
2021 (7 sets)
- A. Transcribes tRNA, 5s rRNA and snRNA
- B. Transcribes precursor of mRNA
- C. Transcribes only snRNAs
- D. Transcribes rRNAs (28S, 18S and 5.8S)
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Q150
BIOLOGY
Unit 3: Cell Structure and Function
What is the role of RNA polymerase III in the process of transcription in eukaryotes?
↻ Repeated question — also appeared in
2021 (3 sets)
- A. Transcribes tRNA, 5s rRNA and snRNA
- B. Transcribes precursor of mRNA
- C. Transcribes only snRNAs
- D. Transcribes rRNAs (28S, 18S and 5.8S)
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Q151
BIOLOGY
Unit 5: Human Physiology
Sphincter of oddi is present at :
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2021 (10 sets)
- A. Junction of hepato-pancreatic duct and duodenum
- B. Gastro-oesophageal junction
- C. Junction of jejunum and duodenum
- D. Ileo-caecal junction
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Q151
BIOLOGY
Unit 5: Human Physiology
Sphincter of oddi is present at :
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Junction of hepato-pancreatic duct and duodenum
- B. Gastro-oesophageal junction
- C. Junction of jejunum and duodenum
- D. Ileo-caecal junction
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Q152
BIOLOGY
Unit 6: Reproduction
Receptors for sperm binding in mammals are present on :
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2021 (10 sets)
- A. Vitelline membrane
- B. Perivitelline space
- C. Zona pellucida
- D. Corona radiata
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Q152
BIOLOGY
Unit 6: Reproduction
Receptors for sperm binding in mammals are present on :
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Vitelline membrane
- B. Perivitelline space
- C. Zona pellucida
- D. Corona radiata
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Q153
BIOLOGY
Unit 1: Diversity in Living World
Match List - I with List - II.
(a) Metamerism (i) Coelenterata
(b) Canal system (ii) Ctenophora
(c) Comb plates (iii) Annelida
(d) Cnidoblasts (iv) Porifera
↻ Repeated question — also appeared in
2021 (7 sets)
- A. (1)(iii)(iv)(i)(ii)
- B. (2)(iii)(iv)(ii)(i)
- C. (3)(iv)(i)(ii)(iii)
- D. (4)(iv)(iii)(i)(ii)
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Q154
BIOLOGY
Unit 8: Biology and Human Welfare
Match List - I with List - II.
(a) Aspergillus niger (i) Acetic Acid
(b) Acetobacter aceti (ii) Lactic Acid
(c) Clostridium butylicum (iii) Citric Acid
(d) Lactobacillus (iv) Butyric Acid
↻ Repeated question — also appeared in
2021 (7 sets)
- A. (1)(i)(ii)(iii)(iv)
- B. (2)(ii)(iii)(i)(iv)
- C. (3)(iv)(ii)(i)(iii)
- D. (4)(iii)(i)(iv)(ii)
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Q155
BIOLOGY
Unit 3: Cell Structure and Function
The fruit fly has 8 chromosomes (2n) in each cell. During interphase of Mitosis if the number of chromosomes at G1 phase is 8, what would be the number of chromosomes after S phase?
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2021 (9 sets)
- A. 16
- B. 4
- C. 32
- D. 8
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Q156
BIOLOGY
Unit 5: Human Physiology
Succus entericus is referred to as :
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- A. Intestinal juice
- B. Gastric juice
- C. Chyme
- D. Pancreatic juice
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Q157
BIOLOGY
Unit 3: Cell Structure and Function
The centriole undergoes duplication during :
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2021 (9 sets)
- A. Prophase
- B. Metaphase
- C. G2 phase
- D. S-phase
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Q158
BIOLOGY
Unit 3: Cell Structure and Function
Which stage of meiotic prophase shows terminalisation of chiasmata as its distinctive feature?
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2021 (8 sets)
- A. Zygotene
- B. Diakinesis
- C. Pachytene
- D. Leptotene
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Q160
BIOLOGY
Unit 5: Human Physiology
The partial pressures (in mm Hg) of oxygen (O2) and carbon dioxide (CO2) at alveoli (the site of diffusion) are :
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2021 (9 sets)
- A. pO2=40 and pCO2=45
- B. pO2=95 and pCO2=40
- C. pO2=159 and pCO2=0.3
- D. pO2=104 and pCO2=40
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Q161
BIOLOGY
Unit 1: Diversity in Living World
Which one of the following organisms bears hollow and pneumatic long bones?
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- A. Hemidactylus
- B. Macropus
- C. Ornithorhynchus
- D. Neophron
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Q162
BIOLOGY
Unit 10: Ecology and Environment
Dobson units are used to measure thickness of :
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2021 (9 sets)
- A. Stratosphere
- B. Ozone
- C. Troposphere
- D. CFCs
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Q164
BIOLOGY
Unit 5: Human Physiology
Which enzyme is responsible for the conversion of inactive fibrinogens to fibrins ?
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2021 (9 sets)
- A. Renin
- B. Epinephrine
- C. Thrombokinase
- D. Thrombin
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Q165
BIOLOGY
Unit 3: Cell Structure and Function
The organelles that are included in the endomembrane system are :
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- A. Endoplasmic reticulum, Golgi complex, Lysosomes and Vacuoles
- B. Golgi complex, Mitochondria, Ribosomes and Lysosomes
- C. Golgi complex, Endoplasmic reticulum, Mitochondria and Lysosomes
- D. Endoplasmic reticulum, Mitochondria, Ribosomes and Lysosomes
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Q166
BIOLOGY
Unit 9: Biotechnology and Its Applications
During the process of gene amplification using PCR, if very high temperature is not maintained in the beginning, then which of the following steps of PCR will be affected first ?
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Extension
- B. Denaturation
- C. Ligation
- D. Annealing
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Q166
BIOLOGY
Unit 9: Biotechnology and Its Applications
During the process of gene amplification using PCR, if very high temperature is not maintained in the beginning, then which of the following steps of PCR will be affected first?
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Extension
- B. Denaturation
- C. Ligation
- D. Annealing
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Q167
BIOLOGY
Unit 3: Cell Structure and Function
Which is the “Only enzyme” that has “Capability” to catalyse Initiation, Elongation and Termination in the process of transcription in prokaryotes ?
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2021 (3 sets)
- A. DNA dependent RNA polymerase
- B. DNA Ligase
- C. DNase
- D. DNA dependent DNA polymerase
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Q167
BIOLOGY
Unit 7: Genetics and Evolution
Which is the “Only enzyme” that has “Capability” to catalyse Initiation, Elongation and Termination in the process of transcription in prokaryotes?
↻ Repeated question — also appeared in
2021 (6 sets)
- A. DNA dependent RNA polymerase
- B. DNA Ligase
- C. DNase
- D. DNA dependent DNA polymerase
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Q168
BIOLOGY
Unit 5: Human Physiology
Erythropoietin hormone which stimulates R.B.C. formation is produced by :
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2021 (10 sets)
- A. The cells of rostral adenohypophysis
- B. The cells of bone marrow
- C. Juxtaglomerular cells of the kidney
- D. Alpha cells of pancreas
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Q168
BIOLOGY
Unit 5: Human Physiology
Erythropoietin hormone which stimulates R.B.C. formation is produced by:
↻ Repeated question — also appeared in
2021 (10 sets)
- A. The cells of rostral adenohypophysis
- B. The cells of bone marrow
- C. Juxtaglomerular cells of the kidney
- D. Alpha cells of pancreas
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Q169
BIOLOGY
Unit 5: Human Physiology
Chronic auto immune disorder affecting neuro muscular junction leading to fatigue, weakening and paralysis of skeletal muscle is called as :
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2021 (10 sets)
- A. Muscular dystrophy
- B. Myasthenia gravis
- C. Gout
- D. Arthritis
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Q169
BIOLOGY
Unit 5: Human Physiology
Chronic auto immune disorder affecting neuro muscular junction leading to fatigue, weakening and paralysis of skeletal muscle is called as:
↻ Repeated question — also appeared in
2021 (10 sets)
- A. Muscular dystrophy
- B. Myasthenia gravis
- C. Gout
- D. Arthritis
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Q170
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Which of the following characteristics is incorrect with respect to cockroach?
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2021 (9 sets)
- A. Hypopharynx lies within the cavity enclosed by the mouth parts.
- B. In females, 7th-9th sterna together form a genital pouch.
- C. 10th abdominal segment in both sexes, bears a pair of anal cerci.
- D. A ring of gastric caeca is present at the junction of midgut and hind gut.
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Q171
BIOLOGY
Unit 7: Genetics and Evolution
If Adenine makes 30% of the DNA molecule, what will be the percentage of Thymine, Guanine and Cytosine in it?
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2021 (8 sets)
- A. T : 20 ; G : 20 ; C : 30
- B. T : 30 ; G : 20 ; C : 20
- C. T : 20 ; G : 25 ; C : 25
- D. T : 20 ; G : 30 ; C : 20
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Q172
BIOLOGY
Unit 9: Biotechnology and Its Applications
For effective treatment of the disease, early diagnosis and understanding its pathophysiology is very important. Which of the following molecular diagnostic techniques is very useful for early detection?
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2021 (9 sets)
- A. Southern Blotting Technique
- B. ELISA Technique
- C. Hybridization Technique
- D. Western Blotting Technique
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Q173
BIOLOGY
Unit 8: Biology and Human Welfare
Identify the incorrect pair.
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2021 (5 sets)
- A. Toxin - Abrin
- B. Lectins - Concanavalin A
- C. Drugs - Ricin
- D. Alkaloids- Codeine
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Q174
BIOLOGY
Unit 6: Reproduction
Veneral diseases can spread through: (a) Using sterile needles (b) Transfusion of blood from infected person (c) Infected mother to foetus (d) Kissing (e) Inheritance. Choose the correct answer from the options given below.
↻ Repeated question — also appeared in
2021 (2 sets)
- A. (b), (c) and (d) only
- B. (b) and (c) only
- C. (a) and (c) only
- D. (a), (b) and (c) only
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Q175
BIOLOGY
Unit 9: Biotechnology and Its Applications
With regard to insulin choose correct options. (a) C-peptide is not present in mature insulin. (b) The insulin produced by rDNA technology has C-peptide. (c) The pro-insulin has C-peptide. (d) A-peptide and B-peptide of insulin are interconnected by disulphide bridges. Choose the correct answer from the options given below.
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2021 (8 sets)
- A. (b) and (c) only
- B. (a), (c) and (d) only
- C. (a) and (d) only
- D. (b) and (d) only
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Q193
CHEMISTRY
Unit 19: Biomolecules
Following are the statements with reference to ‘lipids’. (a) Lipids having only single bonds are called unsaturated fatty acids. (b) Lecithin is a phospholipid. (c) Trihydroxy propane is glycerol. (d) Palmitic acid has 20 carbon atoms including carboxyl carbon. (e) Arachidonic acid has 16 carbon atoms. Choose the correct answer from the options given below.
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2021 (2 sets)
- A. (c) and (d) only
- B. (b) and (c) only
- C. (b) and (e) only
- D. (a) and (b) only
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