Q1
PHYSICS
Unit 4: Work Energy and Power
When a block of mass M is suspended by a long wire of length L, the length of the wire becomes (L + l). The elastic potential energy stored in the extended wire is:
- A. Mgl
- B. MgL
- C. 1/2 Mgl
- D. 1/2 MgL
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Q2
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
A mass m is attached to a thin wire and whirled in a vertical circle. The wire is most likely to break when:
- A. the mass is at the highest point
- B. the wire is horizontal
- C. the mass is at the lowest point
- D. inclined at an angle of 60° from vertical
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Q3
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
Ionized hydrogen atoms and α-particles with same momenta enter perpendicular to a constant magnetic field B. The ratio of their radii of paths r_H : r_α will be:
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- A. 2 : 1
- B. 1 : 2
- C. 4 : 1
- D. 1 : 4
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Q4
PHYSICS
Unit 3: Laws of Motion
Body A of mass 4m moving with speed u collides with another body B of mass 2m, at rest. The collision is head on and elastic in nature. After the collision the fraction of energy lost by the colliding body A is:
- A. 1/9
- B. 8/9
- C. 4/9
- D. 5/9
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Q5
PHYSICS
Unit 16: Optics
In a double slit experiment, when light of wavelength 400 nm was used, the angular width of the first minima formed on a screen placed 1 m away, was found to be 0.2°. What will be the angular width of the first minima, if the entire experimental apparatus is immersed in water? (μ_water = 4/3)
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- A. 0.266°
- B. 0.15°
- C. 0.05°
- D. 0.1°
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Q6
PHYSICS
Unit 14: Electromagnetic Induction and Alternating Currents
In which of the following devices, the eddy current effect is not used?
- A. Induction furnace
- B. Magnetic braking in train
- C. Electromagnet
- D. Electric heater
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Q7
PHYSICS
Unit 7: Properties of Solids and Liquids
A soap bubble, having radius of 1 mm, is blown from a detergent solution having a surface tension of 2.5 × 10^-2 N/m. The pressure inside the bubble equals pressure at a point Z_0 below the free surface of water in a container. Taking g = 10 m/s^2, density of water = 10^3 kg/m^3, the value of Z_0 is:
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- A. 100 cm
- B. 10 cm
- C. 1 cm
- D. 0.5 cm
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Q8
PHYSICS
Unit 15: Electromagnetic Waves
Which colour of the light has the longest wavelength?
- A. Red
- B. Blue
- C. Green
- D. Violet
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Q9
PHYSICS
Unit 5: Rotational Motion
A disc of radius 2 m and mass 100 kg rolls on a horizontal floor. Its centre of mass has speed of 20 cm/s. How much work is needed to stop it?
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- A. 3 J
- B. 30 kJ
- C. 2 J
- D. 1 J
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Q10
PHYSICS
Unit 10: Oscillations and Waves
The displacement of a particle executing simple harmonic motion is given by y = A_0 + A sin ωt + B cos ωt. Then the amplitude of its oscillation is given by:
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- A. √(A0^2 + A^2 + B^2)
- B. √(A^2 + B^2)
- C. √(A0^2 + (A-B)^2)
- D. A + B
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Q10
PHYSICS
Unit 10: Oscillations and Waves
The displacement of a particle executing simple harmonic motion is given by y = A0 + A sin ωt + B cos ωt. Then the amplitude of its oscillation is given by:
- A. √(A0^2 + A^2 + B^2)
- B. √(A^2 + B^2)
- C. √(A0^2 + (A + B)^2)
- D. A + B
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Q11
PHYSICS
Unit 16: Optics
Two similar thin equi-convex lenses, of focal length f each, are kept coaxially in contact with each other such that the focal length of the combination is F1. When the space between the two lenses is filled with glycerin (which has the same refractive index (μ = 1.5) as that of glass), then the equivalent focal length is F2. The ratio F1 : F2 will be:
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- A. 2 : 1
- B. 1 : 2
- C. 2 : 3
- D. 3 : 4
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Q11
PHYSICS
Unit 16: Optics
Two similar thin equi-convex lenses, of focal length f each, are kept coaxially in contact with each other such that the focal length of the combination is F1. When the space between the two lenses is filled with glycerin (which has the same refractive index, μ = 1.5, as that of glass), the equivalent focal length is F2. The ratio F1 : F2 will be:
- A. 2 : 1
- B. 1 : 2
- C. 2 : 3
- D. 3 : 4
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Q12
PHYSICS
Unit 9: Kinetic Theory of Gases
Increase in temperature of a gas filled in a container would lead to:
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- A. Increase in its mass
- B. Increase in its kinetic energy
- C. Decrease in its pressure
- D. Decrease in intermolecular distance
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Q12
PHYSICS
Unit 9: Kinetic Theory of Gases
Increase in temperature of a gas filled in a container would lead to:
- A. Increase in its mass
- B. Increase in its kinetic energy
- C. Decrease in its pressure
- D. Decrease in intermolecular distance
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Q13
PHYSICS
Unit 17: Dual Nature of Matter and Radiation
An electron is accelerated through a potential difference of 10,000 V. Its de Broglie wavelength is, nearly: (m_e = 9 × 10^-31 kg)
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- A. 12.2 × 10^-13 m
- B. 12.2 × 10^-12 m
- C. 12.2 × 10^-14 m
- D. 12.2 nm
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Q13
PHYSICS
Unit 17: Dual Nature of Matter and Radiation
An electron is accelerated through a potential difference of 10,000 V. Its de Broglie wavelength is, nearly: (m_e = 9 × 10^-31 kg)
- A. 12.2 × 10^-13 m
- B. 12.2 × 10^-12 m
- C. 12.2 × 10^-14 m
- D. 12.2 nm
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Q14
PHYSICS
Unit 7: Properties of Solids and Liquids
A copper rod of 88 cm and an aluminium rod of unknown length have their increase in length independent of increase in temperature. The length of the aluminium rod is: (α_Cu = 1.7 × 10^-5 K^-1 and α_Al = 2.2 × 10^-5 K^-1)
- A. 6.8 cm
- B. 113.9 cm
- C. 88 cm
- D. 68 cm
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Q15
PHYSICS
Unit 16: Optics
Pick the wrong answer in the context with rainbow.
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- A. When the light rays undergo two internal reflections in a water drop, a secondary rainbow is formed
- B. The order of colours is reversed in the secondary rainbow
- C. An observer can see a rainbow when his front is towards the sun
- D. Rainbow is a combined effect of dispersion, refraction and reflection of sunlight
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Q16
PHYSICS
Unit 6: Gravitation
A body weighs 200 N on the surface of the earth. How much will it weigh half way down to the centre of the earth?
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- A. 150 N
- B. 200 N
- C. 250 N
- D. 100 N
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Q17
PHYSICS
Unit 12: Current Electricity
Six similar bulbs are connected as shown in the figure with a DC source of emf E and zero internal resistance. The ratio of power consumption by the bulbs when (i) all are glowing and (ii) in the situation when two from section A and one from section B are glowing, will be:
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- A. 4 : 9
- B. 9 : 4
- C. 1 : 2
- D. 2 : 1
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Q18
PHYSICS
Unit 19: Electronic Devices
For a p-type semiconductor, which of the following statements is true?
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- A. Electrons are the majority carriers and trivalent atoms are the dopants.
- B. Holes are the majority carriers and trivalent atoms are the dopants.
- C. Holes are the majority carriers and pentavalent atoms are the dopants.
- D. Electrons are the majority carriers and pentavalent atoms are the dopants.
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Q19
PHYSICS
Unit 10: Oscillations and Waves
Average velocity of a particle executing SHM in one complete vibration is:
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- A. ωA/2
- B. Aω
- C. ωA/2²
- D. Zero
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Q20
PHYSICS
Unit 8: Thermodynamics
The unit of thermal conductivity is:
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- A. J m K^-1
- B. J m^-1 K^-1
- C. W m K^-1
- D. W m^-1 K^-1
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Q21
PHYSICS
Unit 5: Rotational Motion
A solid cylinder of mass 2 kg and radius 4 cm rotating about its axis at the rate of 3 rpm. The torque required to stop after 2π revolutions is:
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- A. 2 × 10^-6 N m
- B. 2 × 10^-3 N m
- C. 12 × 10^-4 N m
- D. 2 × 10^6 N m
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Q22
PHYSICS
Unit 4: Work Energy and Power
A force F = 20 + 10y acts on a particle in y-direction where F is in newton and y in meter. Work done by this force to move the particle from y = 0 to y = 1 m is
↻ Repeated question — also appeared in
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- A. 30 J
- B. 5 J
- C. 25 J
- D. 20 J
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Q23
PHYSICS
Unit 12: Current Electricity
Which of the following acts as a circuit protective device?
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- A. Conductor
- B. Inductor
- C. Switch
- D. Fuse
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Q24
PHYSICS
Unit 12: Current Electricity
In the circuits shown below, the readings of voltmeters and the ammeters will be
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- A. V2 > V1 and i1 = i2
- B. V1 = V2 and i1 > i2
- C. V1 = V2 and i1 = i2
- D. V2 > V1 and i1 > i2
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Q25
PHYSICS
Unit 11: Electrostatics
A hollow metal sphere of radius R is uniformly charged. The electric field due to the sphere at a distance r from the centre:
↻ Repeated question — also appeared in
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- A. Increases as r increases for r < R and for r > R
- B. Zero as r increases for r < R, decreases as r increases for r > R
- C. Zero as r increases for r < R, increases as r increases for r > R
- D. Decreases as r increases for r < R and for r > R
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Q26
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
At a point A on the earth’s surface the angle of dip, δ = +25°. At a point B on the earth’s surface the angle of dip, δ = -25°. We can interpret that:
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- A. A and B are both located in the northern hemisphere.
- B. A is located in the southern hemisphere and B is located in the northern hemisphere.
- C. A is located in the northern hemisphere and B is located in the southern hemisphere.
- D. A and B are both located in the southern hemisphere.
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Q26
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
At a point A on the earth’s surface the angle of dip, δ = +25°. At a point B on the earth’s surface the angle of dip, δ = –25°. We can interpret that:
- A. A and B are both located in the northern hemisphere.
- B. A is located in the southern hemisphere and B is located in the northern hemisphere.
- C. A is located in the northern hemisphere and B is located in the southern hemisphere.
- D. A and B are both located in the southern hemisphere.
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Q27
PHYSICS
Unit 18: Atoms and Nuclei
The total energy of an electron in an atom in an orbit is -3.4 eV. Its kinetic and potential energies are, respectively:
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- A. -3.4 eV, -3.4 eV
- B. -3.4 eV, -6.8 eV
- C. 3.4 eV, -6.8 eV
- D. 3.4 eV, 3.4 eV
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Q27
PHYSICS
Unit 18: Atoms and Nuclei
The total energy of an electron in an atom in an orbit is –3.4 eV. Its kinetic and potential energies are, respectively:
- A. –3.4 eV, –3.4 eV
- B. –3.4 eV, –6.8 eV
- C. 3.4 eV, –6.8 eV
- D. 3.4 eV, 3.4 eV
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Q28
PHYSICS
Unit 16: Optics
In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be the angle of refraction?
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- A. 180°
- B. 0°
- C. Equal to angle of incidence
- D. 90°
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Q28
PHYSICS
Unit 16: Optics
In total internal reflection, when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be the angle of refraction?
- A. 180°
- B. 0°
- C. Equal to angle of incidence
- D. 90°
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Q29
PHYSICS
Unit 6: Gravitation
The work done to raise a mass m from the surface of the earth to a height h, which is equal to the radius of the earth, is:
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- A. mgR
- B. 2 mgR
- C. 1/2 mgR
- D. 3/2 mgR
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Q30
PHYSICS
Unit 2: Kinematics
When an object is shot from the bottom of a long smooth inclined plane kept at an angle 60° with horizontal, it can travel a distance x1 along the plane. But when the inclination is decreased to 30° and the same object is shot with the same velocity, it can travel a distance x2. Then x1 : x2 will be:
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- A. 1 : 2
- B. 2 : 1
- C. 1 : 3
- D. 1 : 2√3
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Q31
PHYSICS
Unit 18: Atoms and Nuclei
α-particle consists of:
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- A. 2 protons and 2 neutrons only
- B. 2 electrons, 2 protons and 2 neutrons
- C. 2 electrons and 4 protons only
- D. 2 protons only
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Q32
PHYSICS
Unit 2: Kinematics
The speed of a swimmer in still water is 20 m/s. The speed of river water is 10 m/s and is flowing due east. If he is standing on the south bank and wishes to cross the river along the shortest path, the angle at which he should make his strokes w.r.t. north is given by:
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- A. 30° west
- B. 0°
- C. 60° west
- D. 45° west
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Q33
PHYSICS
Unit 3: Laws of Motion
A particle moving with velocity v is acted on by three forces shown by the vector triangle PQR. The velocity of the particle will:
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- A. increase
- B. decrease
- C. remain constant
- D. change according to the smallest force
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Q34
PHYSICS
Unit 5: Rotational Motion
Two particles A and B are moving in uniform circular motion in concentric circles of radii rA and rB with speeds vA and vB respectively. Their time period of revolution is the same. The ratio of angular speed of A to that of B will be:
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- A. rA : rB
- B. vA : vB
- C. rB : rA
- D. 1 : 1
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Q35
PHYSICS
Unit 5: Rotational Motion
A block of mass 10 kg is in contact against the inner wall of a hollow cylindrical drum of radius 1 m. The coefficient of friction between the block and the inner wall of the cylinder is 0.1. The minimum angular velocity needed for the cylinder to keep the block stationary when the cylinder is vertical and rotating about its axis, will be: (g = 10 m/s²)
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- A. 10 rad/s
- B. 10π/2 rad/s
- C. 10 rad/s
- D. 10π rad/s
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Q36
PHYSICS
Unit 11: Electrostatics
Two parallel infinite line charges with linear charge densities +λ C/m and –λ C/m are placed at a distance of 2R in free space. What is the electric field midway between the two line charges?
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- A. Zero
- B. λ/(2πϵ0R) N/C
- C. λ/(πϵ0R) N/C
- D. λ/(πϵ02R) N/C
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Q37
PHYSICS
Unit 11: Electrostatics
Two point charges A and B, having charges +Q and –Q respectively, are placed at certain distance apart and force acting between them is F. If 25% charge of A is transferred to B, then force between the charges becomes:
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- A. F
- B. 9F/16
- C. 16F/9
- D. 4F/3
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Q38
PHYSICS
Unit 20: Experimental Skills
A small hole of area of cross-section 2 mm² is present near the bottom of a fully filled open tank of height 2 m. Taking g = 10 m/s², the rate of flow of water through the open hole would be nearly
- A. 12.6 × 10^-6 m^3/s
- B. 8.9 × 10^-6 m^3/s
- C. 2.23 × 10^-6 m^3/s
- D. 6.4 × 10^-6 m^3/s
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Q39
PHYSICS
Unit 19: Electronic Devices
The circuit diagram shown represents the correct Boolean operation:
- A. AND
- B. OR
- C. NAND
- D. NOR
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Q39
PHYSICS
Unit 19: Electronic Devices
The correct Boolean operation represented by the circuit diagram drawn is:
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- A. AND
- B. OR
- C. NAND
- D. NOR
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Q40
PHYSICS
Unit 8: Thermodynamics
In which of the following processes, heat is neither absorbed nor released by a system?
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- A. Isothermal
- B. Adiabatic
- C. Isobaric
- D. Isochoric
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Q40
PHYSICS
Unit 8: Thermodynamics
In which of the following processes, heat is neither absorbed nor released by a system?
- A. Isothermal
- B. Adiabatic
- C. Isobaric
- D. Isochoric
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Q41
PHYSICS
Unit 14: Electromagnetic Induction and Alternating Currents
An 800 turn coil of effective area 0.05 m² is kept perpendicular to a magnetic field 5 × 10^-5 T. When the plane of the coil is rotated by 90° around any of its coplanar axis in 0.1 s, the emf induced in the coil will be:
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- A. 2 V
- B. 0.2 V
- C. 2 × 10^-3 V
- D. 0.02 V
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Q41
PHYSICS
Unit 14: Electromagnetic Induction and Alternating Currents
An 800-turn coil of effective area 0.05 m² is kept perpendicular to a magnetic field of 5 × 10⁻⁵ T. When the plane of the coil is rotated by 90° around any of its coplanar axis in 0.1 s, the emf induced in the coil will be:
- A. 2 V
- B. 0.2 V
- C. 2 × 10⁻³ V
- D. 0.02 V
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Q42
PHYSICS
Unit 10: Oscillations and Waves
The radius of circle, the period of revolution, initial position and sense of revolution are indicated in the figure. The y-projection of the radius vector of the rotating particle P is:
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- A. y(t) = −3 cos(2πt), where y is in m
- B. y(t) = 4 sin(πt/2), where y is in m
- C. y(t) = 3 cos(3πt/2), where y is in m
- D. y(t) = 3 cos(πt/2), where y is in m
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Q43
PHYSICS
Unit 11: Electrostatics
A parallel plate capacitor of capacitance 20 μF is being charged by a voltage source whose potential is changing at the rate of 3 V/s. The conduction current through the connecting wires, and the displacement current through the plates of the capacitor, would be, respectively.
- A. Zero, 60 μA
- B. 60 μA, 60 μA
- C. 60 μA, zero
- D. Zero, zero
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Q44
PHYSICS
Unit 1: Physics and Measurement
In an experiment, the percentage of error occurred in the measurement of physical quantities A, B, C and D are 1%, 2%, 3% and 4% respectively. Then the maximum percentage of error in the measurement of X, where X = A^(1/2) B^(1/3) / C^(2/3) D, will be
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- A. 13%
- B. 16%
- C. -10%
- D. 10%
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Q45
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
A cylindrical conductor of radius R is carrying a constant current. The plot of the magnitude of the magnetic field B with the distance d from the centre of the conductor is correctly represented by the figure:
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Q46
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
The number of sigma (σ) and pi (π) bonds in pent-2-en-4-yne is
- A. 10 σ bonds and 3 π bonds
- B. 8 σ bonds and 5 π bonds
- C. 11 σ bonds and 2 π bonds
- D. 13 σ bonds and no π bonds
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Q47
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
The structure of intermediate A in the following reaction is:
- A. ROO•-type peroxide intermediate (as drawn in option 1)
- B. Carbocation/peroxyacid intermediate (as drawn in option 2)
- C. Peroxide intermediate (as drawn in option 3)
- D. Hydroperoxide intermediate (as drawn in option 4)
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Q48
CHEMISTRY
Unit 10: p-Block Elements
The correct structure of tribromooctaoxide is
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- A. As shown in option 1
- B. As shown in option 2
- C. As shown in option 3
- D. As shown in option 4
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Q49
CHEMISTRY
Unit 2: Atomic Structure
4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is
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- A. 5f > 6p > 5p > 4d
- B. 6p > 5f > 5p > 4d
- C. 6p > 5f > 4d > 5p
- D. 5f > 6p > 4d > 5p
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Q50
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
Which of the following reactions are disproportionation reaction?
(a) Cu⁺ + Cu²⁺ → 2Cu²⁺
(b) 3MnO₄²⁻ + 4H⁺ → 2MnO₄⁻ + MnO₂ + 2H₂O
(c) 2KMnO₄ Δ→ K₂MnO₄ + MnO₂ + O₂
(d) 2MnO₂ + 3Mn²⁺ + 2H₂O → 5MnO + 4H⁺
Select the correct option from the following
- A. (a) and (b) only
- B. (a), (b) and (c)
- C. (a), (c) and (d)
- D. (a) and (d) only
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Q51
CHEMISTRY
Unit 4: Chemical Thermodynamics
Under isothermal condition, a gas at 300 K expands from 0.1 L to 0.25 L against a constant external pressure of 2 bar. The work done by the gas is (Given that 1 L bar = 100 J)
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- A. –30 J
- B. 5 kJ
- C. 25 J
- D. 30 J
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Q52
BIOLOGY
Unit 10: Ecology and Environment
Among the following, the one that is not a greenhouse gas is
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- A. Nitrous oxide
- B. Methane
- C. Ozone
- D. Sulphur dioxide
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Q53
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
For the cell reaction Fe³⁺(aq) + 2I⁻(aq) → Fe²⁺(aq) + I₂(aq), E°cell = 0.24 V at 298 K. The standard Gibbs energy ΔrG° of the cell reaction is:
- A. –46.32 kJ mol⁻¹
- B. –23.16 kJ mol⁻¹
- C. 46.32 kJ mol⁻¹
- D. 23.16 kJ mol⁻¹
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Q54
CHEMISTRY
Unit 12: Coordination Compounds
Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor. M is:
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2019 (1 set)
- A. Be
- B. Mg
- C. Ca
- D. Sr
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Q54
BIOLOGY
Unit 5: Human Physiology
Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor. M is:
- A. Be
- B. Mg
- C. Ca
- D. Sr
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Q55
CHEMISTRY
Unit 15: Hydrocarbons
The most suitable reagent for the following conversion, is: cis-2-butene → trans-2-butene
↻ Repeated question — also appeared in
2019 (2 sets)
- A. Na / liquid NH₃
- B. H₂, Pd/C, quinoline
- C. Zn / HCl
- D. Hg²⁺ / H⁺, H₂O
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Q56
CHEMISTRY
Unit 10: p-Block Elements
Which is the correct thermal stability order for H₂E (E = O, S, Se, Te and Po)?
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2019 (3 sets)
- A. H₂S < H₂O < H₂Se < H₂Te < H₂Po
- B. H₂O < H₂S < H₂Se < H₂Te < H₂Po
- C. H₂Po < H₂Te < H₂Se < H₂S < H₂O
- D. H₂Se < H₂Te < H₂Po < H₂O < H₂S
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Q57
CHEMISTRY
Unit 10: p-Block Elements
Which of the following is incorrect statement?
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- A. PbF₄ is covalent in nature
- B. SiCl₄ is easily hydrolysed
- C. GeX₄ (X = F, Cl, Br, I) is more stable than GeX₂
- D. SnF₄ is ionic in nature
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Q58
CHEMISTRY
Unit 10: p-Block Elements
Match the following:
(a) Pure nitrogen
(b) Haber process
(c) Contact process
(d) Deacon’s process
(i) Chlorine
(ii) Sulphuric acid
(iii) Ammonia
(iv) Sodium azide or barium azide
Which of the following is the correct option?
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2019 (1 set)
- A. (i) (ii) (iii) (iv)
- B. (ii) (iv) (i) (iii)
- C. (iii) (iv) (ii) (i)
- D. (iv) (iii) (ii) (i)
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Q59
CHEMISTRY
Unit 2: Atomic Structure
Which of the following diatomic molecular species has only π bonds according to Molecular Orbital Theory?
- A. O2
- B. N2
- C. C2
- D. Be2
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Q60
CHEMISTRY
Unit 9: Classification of Elements and Periodicity in Properties
For the second period elements the correct increasing order of first ionisation enthalpy is:
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- A. Li < Be < B < C < N < O < F < Ne
- B. Li < B < Be < C < O < N < F < Ne
- C. Li < B < Be < C < N < O < F < Ne
- D. Li < Be < B < C < O < N < F < Ne
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Q61
CHEMISTRY
Unit 19: Biomolecules
The biodegradable polymer is:
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- A. Nylon-6,6
- B. Nylon 2-Nylon 6
- C. Nylon-6
- D. Buna-S
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Q62
CHEMISTRY
Unit 6: Equilibrium
pH of a saturated solution of Ca(OH)2 is 9. The solubility product (Ksp) of Ca(OH)2 is:
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2019 (2 sets)
- A. 0.5 × 10^-15
- B. 0.25 × 10^-10
- C. 0.125 × 10^-15
- D. 0.5 × 10^-10
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Q63
CHEMISTRY
Unit 8: Chemical Kinetics
If the rate constant for a first order reaction is k, the time required for the completion of 99% of the reaction is given by:
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- A. t = 0.693/k
- B. t = 6.909/k
- C. t = 4.606/k
- D. t = 2.303/k
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Q64
CHEMISTRY
Unit 19: Biomolecules
The non-essential amino acid among the following is:
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- A. valine
- B. leucine
- C. alanine
- D. lysine
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Q65
CHEMISTRY
Unit 16: Organic Compounds Containing Halogens
Among the following, the reaction that proceeds through an electrophilic substitution is:
- A. Chlorination of an aromatic compound using CuCl2 / NCS-type conditions
- B. Benzene + Cl2 in presence of AlCl3 → chlorobenzene + HCl
- C. Chlorination of an alkene under UV light
- D. CH3OH + HCl → CH3Cl + H2O
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Q66
CHEMISTRY
Unit 5: Solutions
The mixture that forms maximum boiling azeotrope is:
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- A. Water + Nitric acid
- B. Ethanol + Water
- C. Acetone + Carbon disulphide
- D. Heptane + Octane
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Q67
CHEMISTRY
Unit 8: Chemical Kinetics
For the chemical reaction N2(g) + 3H2(g) → 2NH3(g), the correct relation is:
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2019 (1 set)
- A. -(1/3) d[NH3]/dt = -(1/2) d[H2]/dt
- B. -(3/2) d[NH3]/dt = d[N2]/dt
- C. -(1/3) d[NH3]/dt = (1/2) d[N2]/dt
- D. d[NH3]/dt = d[H2]/dt
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Q68
CHEMISTRY
Unit 8: Chemical Kinetics
The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber’s process is:
- A. 10
- B. 20
- C. 30
- D. 40
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Q69
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
The compound that is most difficult to protonate is:
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- A. Methanol
- B. Ethanol
- C. Dimethyl ether
- D. Phenol
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Q70
CHEMISTRY
Unit 5: Solutions
For an ideal solution, the correct option is:
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- A. Δmix S = 0 at constant T and P
- B. Δmix V ≠ 0 at constant T and P
- C. Δmix H = 0 at constant T and P
- D. Δmix G = 0 at constant T and P
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Q71
CHEMISTRY
Unit 6: Equilibrium
Conjugate bases of the Brønsted acids H2O and HF are:
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- A. OH− and H2F+, respectively
- B. H3O+ and F−, respectively
- C. OH− and F−, respectively
- D. H3O+ and H2F+, respectively
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Q72
PHYSICS
Unit 20: Experimental Skills
Which mixture of solutions will lead to the formation of negatively charged colloidal AgI sol?
- A. 50 mL of 1 M AgNO3 + 50 mL of 1.5 M KI
- B. 50 mL of 1 M AgNO3 + 50 mL of 2 M KI
- C. 50 mL of 2 M AgNO3 + 50 mL of 1.5 M KI
- D. 50 mL of 0.1 M AgNO3 + 50 mL of 0.1 M KI
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Q73
CHEMISTRY
Unit 18: Organic Compounds Containing Nitrogen
Among the following, the narrow spectrum antibiotic is:
- A. Penicillin G
- B. Ampicillin
- C. Amoxycillin
- D. Chloramphenicol
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Q74
CHEMISTRY
Unit 15: Hydrocarbons
An alkene A on reaction with O3 and Zn–H2O gives propanone and ethanal in equimolar ratio. Addition of HCl to alkene A gives B as the major product. The structure of product B is:
↻ Repeated question — also appeared in
2019 (3 sets)
- A. CH3COCH2CH2CH3
- B. CH3CH2CH(Cl)CH2CH3
- C. CH3CH2C(Cl)(CH3)CH3
- D. CH3CH2CH(CH3)CH2Cl
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Q75
CHEMISTRY
Unit 12: Coordination Compounds
What is the correct electronic configuration of the central atom in K4[Fe(CN)6] based on crystal field theory?
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2019 (3 sets)
- A. t2g4 eg2
- B. t2g6 eg0
- C. t2g3 eg3
- D. t2g4 eg0
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Q76
CHEMISTRY
Unit 12: Coordination Compounds
Identify the incorrect statement related to PCl5 from the following:
- A. Three equatorial P–Cl bonds make an angle of 120° with each other
- B. Two axial P–Cl bonds make an angle of 180° with each other
- C. Axial P–Cl bonds are longer than equatorial P–Cl bonds
- D. PCl5 molecule is non-reactive
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Q76
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Identify the incorrect statement related to PCl5 from the following:
- A. Three equatorial P–Cl bonds make an angle of 120° with each other.
- B. Two axial P–Cl bonds make an angle of 180° with each other.
- C. Axial P–Cl bonds are longer than equatorial P–Cl bonds.
- D. PCl5 molecule is non-reactive.
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Q77
CHEMISTRY
Unit 6: Equilibrium
Which will make a basic buffer?
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- A. 50 mL of 0.1 M NaOH + 25 mL of 0.1 M CH3COOH
- B. 100 mL of 0.1 M CH3COOH + 100 mL of 0.1 M NaOH
- C. 100 mL of 0.1 M HCl + 200 mL of 0.1 M NH4OH
- D. 100 mL of 0.1 M HCl + 100 mL of 0.1 M NaOH
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Q78
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
The major product of the following reaction is:
Phthalic acid + NH3, strong heating
- A. Phthalimide
- B. Maleimide
- C. Phthalamic acid
- D. o-Phenylenediamine
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Q78
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
The major product of the following reaction is: a dicarboxylic acid with strong heating in presence of NH3.
- A. Phthalimide-type cyclic imide
- B. A five-membered cyclic anhydride
- C. An amino acid-type product
- D. A diamide
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Q79
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Match the xenon compounds in Column-I with their structure in Column-II and assign the correct code:
Column-I: (a) XeF4, (b) XeF6, (c) XeOF4, (d) XeO3
Column-II: (i) pyramidal, (ii) square planar, (iii) distorted octahedral, (iv) square pyramidal
- A. (a) (i), (b) (ii), (c) (iii), (d) (iv)
- B. (a) (ii), (b) (iii), (c) (iv), (d) (i)
- C. (a) (ii), (b) (iii), (c) (i), (d) (iv)
- D. (a) (iii), (b) (iv), (c) (i), (d) (ii)
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Q80
CHEMISTRY
Unit 10: p-Block Elements
The manganate and permanganate ions are tetrahedral due to:
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- A. The π-bonding involves overlap of p-orbitals of oxygen with d-orbitals of manganese
- B. There is no π-bonding
- C. The π-bonding involves overlap of p-orbitals of oxygen with p-orbitals of manganese
- D. The π-bonding involves overlap of d-orbitals of oxygen with d-orbitals of manganese
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Q81
CHEMISTRY
Unit 10: p-Block Elements
Which of the following species is not stable?
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- A. [SiF6]2−
- B. [GeCl6]2−
- C. [Sn(OH)6]2−
- D. [SiCl6]2−
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Q82
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
For a cell involving one electron, E°cell = 0.59 V at 298 K, the equilibrium constant for the cell reaction is:
- A. 1.0 × 10^2
- B. 1.0 × 10^5
- C. 1.0 × 10^10
- D. 1.0 × 10^30
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Q83
CHEMISTRY
Unit 10: p-Block Elements
Which of the following is an amphoteric hydroxide?
- A. Sr(OH)2
- B. Ca(OH)2
- C. Mg(OH)2
- D. Be(OH)2
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Q84
PHYSICS
Unit 9: Kinetic Theory of Gases
A gas at 350 K and 15 bar has molar volume 20 percent smaller than that for an ideal gas under the same conditions. The correct option about the gas and its compressibility factor (Z) is:
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2019 (2 sets)
- A. Z > 1 and attractive forces are dominant
- B. Z > 1 and repulsive forces are dominant
- C. Z < 1 and attractive forces are dominant
- D. Z < 1 and repulsive forces are dominant
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Q85
BIOLOGY
Unit 5: Human Physiology
A compound is formed by cation C and anion A. The anions form a hexagonal close packed (hcp) lattice and the cations occupy 75% of octahedral voids. The formula of the compound is:
- A. C2A3
- B. C3A2
- C. C3A4
- D. C4A3
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Q86
PHYSICS
Unit 8: Thermodynamics
In which case change in entropy is negative?
- A. Evaporation of water
- B. Expansion of a gas at constant temperature
- C. Sublimation of solid to gas
- D. 2H(g) → H2(g)
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Q87
CHEMISTRY
Unit 2: Atomic Structure
Which of the following series of transitions in the spectrum of hydrogen atom falls in the visible region?
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- A. Lyman series
- B. Balmer series
- C. Paschen series
- D. Brackett series
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Q88
BIOLOGY
Unit 5: Human Physiology
The method used to remove temporary hardness of water is:
- A. Calgon's method
- B. Clark's method
- C. Ion-exchange method
- D. Synthetic resins method
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Q89
CHEMISTRY
Unit 11: d- and f-Block Elements
Which one is malachite from the following?
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- A. CuFeS2
- B. Cu(OH)2
- C. Fe3O4
- D. CuCO3·Cu(OH)2
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Q90
CHEMISTRY
Unit 12: Coordination Compounds
The correct order of the basic strength of methyl substituted amines in aqueous solution is:
- A. (CH3)2NH > CH3NH2 > (CH3)3N
- B. (CH3)3N > CH3NH2 > (CH3)2NH
- C. (CH3)3N > (CH3)2NH > CH3NH2
- D. CH3NH2 > (CH3)2NH > (CH3)3N
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Q91
BIOLOGY
Unit 10: Ecology and Environment
The Earth Summit held in Rio de Janeiro in 1992 was called:
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- A. to reduce CO2 emissions and global warming
- B. for conservation of biodiversity and sustainable utilization of its benefits
- C. to assess threat posed to native species by invasive weed species
- D. for immediate steps to discontinue use of CFCs that were damaging the ozone layer
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Q91
BIOLOGY
Unit 10: Ecology and Environment
The Earth Summit held in Rio de Janeiro in 1992 was called
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2019 (4 sets)
- A. to reduce CO2 emissions and global warming
- B. for conservation of biodiversity and sustainable utilization of its benefits
- C. to assess threat posed to native species by invasive weed species
- D. for immediate steps to discontinue use of CFCs that were damaging the ozone layer
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Q92
BIOLOGY
Unit 5: Human Physiology
Colostrum, the yellowish fluid secreted by mother during the initial days of lactation, is very essential to impart immunity to the new born infants because it contains:
↻ Repeated question — also appeared in
2019 (4 sets)
- A. Natural killer cells
- B. Monocytes
- C. Macrophages
- D. Immunoglobulin A
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Q92
BIOLOGY
Unit 5: Human Physiology
Colostrum, the yellowish fluid secreted by the mother during the initial days of lactation, is very essential to impart immunity to the newborn infant because it contains:
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2019 (4 sets)
- A. Natural killer cells
- B. Monocytes
- C. Macrophages
- D. Immunoglobulin A
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Q93
BIOLOGY
Unit 4: Plant Physiology
Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following:
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- A. Closure of stomata
- B. Flaccidity of bulliform cells
- C. Shrinkage of air spaces in spongy mesophyll
- D. Tyloses in vessels
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Q93
BIOLOGY
Unit 4: Plant Physiology
Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following:
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2019 (3 sets)
- A. Closure of stomata
- B. Flaccidity of bulliform cells
- C. Shrinkage of air spaces in spongy mesophyll
- D. Tyloses in vessels
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Q94
BIOLOGY
Unit 1: Diversity in Living World
The shorter and longer arms of a submetacentric chromosome are referred to as
- A. s-arm and l-arm respectively
- B. p-arm and q-arm respectively
- C. q-arm and p-arm respectively
- D. m-arm and n-arm respectively
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Q94
BIOLOGY
Unit 3: Cell Structure and Function
The shorter and longer arms of a submetacentric chromosome are referred to as
↻ Repeated question — also appeared in
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- A. s-arm and l-arm respectively
- B. p-arm and q-arm respectively
- C. q-arm and p-arm respectively
- D. m-arm and n-arm respectively
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Q95
BIOLOGY
Unit 4: Plant Physiology
Respiratory Quotient (RQ) value of tripalmitin is
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- A. 0.9
- B. 0.7
- C. 0.07
- D. 0.09
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Q96
BIOLOGY
Unit 8: Biology and Human Welfare
Which of the following is a commercial blood cholesterol lowering agent?
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- A. Cyclosporin A
- B. Statin
- C. Streptokinase
- D. Lipases
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Q97
BIOLOGY
Unit 5: Human Physiology
Match the following structures with their respective location in organs:
(a) Crypts of Lieberkuhn
(b) Glisson's capsule
(c) Islets of Langerhans
(d) Brunner's glands
Select the correct option from the following:
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2019 (1 set)
- A. (a) (iii) (i) (ii) (iv)
- B. (a) (ii) (iv) (i) (iii)
- C. (a) (iii) (iv) (i) (ii)
- D. (a) (iii) (ii) (i) (iv)
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Q98
BIOLOGY
Unit 10: Ecology and Environment
Which of the following is the most important cause for animals and plants being driven to extinction?
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- A. Habitat loss and fragmentation
- B. Drought and floods
- C. Economic exploitation
- D. Alien species invasion
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Q99
BIOLOGY
Unit 5: Human Physiology
Which part of the brain is responsible for thermoregulation?
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- A. Cerebrum
- B. Hypothalamus
- C. Corpus callosum
- D. Medulla oblongata
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Q100
BIOLOGY
Unit 1: Diversity in Living World
Consider the following features:
(a) Organ system level of organisation
(b) Bilateral symmetry
(c) True coelomates with segmentation of body
Select the correct option of animal groups which possess all the above characteristics.
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- A. Annelida, Arthropoda and Chordata
- B. Annelida, Arthropoda and Mollusca
- C. Arthropoda, Mollusca and Chordata
- D. Annelida, Mollusca and Chordata
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Q101
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth:
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- A. Pharynx → Oesophagus → Crop → Gizzard → Ileum → Colon → Rectum
- B. Pharynx → Oesophagus → Gizzard → Crop → Ileum → Colon → Rectum
- C. Pharynx → Oesophagus → Gizzard → Ileum → Crop → Colon → Rectum
- D. Pharynx → Oesophagus → Ileum → Crop → Gizzard → Colon → Rectum
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Q102
BIOLOGY
Unit 10: Ecology and Environment
Which of the following pairs of gases is mainly responsible for greenhouse effect?
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- A. Ozone and Ammonia
- B. Oxygen and Nitrogen
- C. Nitrogen and Sulphur dioxide
- D. Carbon dioxide and Methane
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Q103
BIOLOGY
Unit 5: Human Physiology
Which of the following muscular disorders is inherited?
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- A. Tetany
- B. Muscular dystrophy
- C. Myasthenia gravis
- D. Botulism
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Q104
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Bile duct and Bronchioles
- B. Fallopian tubes and Pancreatic duct
- C. Eustachian tube and Salivary duct
- D. Bronchioles and Fallopian tubes
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Q105
BIOLOGY
Unit 5: Human Physiology
Match Column-I with Column-II:
(a) P-wave
(b) QRS complex
(c) T-wave
(d) Reduction in the size of T-wave
Column-II:
(i) Depolarisation of ventricles
(ii) Repolarisation of ventricles
(iii) Coronary ischemia
(iv) Depolarisation of atria
(v) Repolarisation of atria
Select the correct option.
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2019 (3 sets)
- A. (iv) (i) (ii) (iii)
- B. (iv) (i) (ii) (v)
- C. (ii) (i) (v) (iii)
- D. (ii) (iii) (v) (iv)
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Q106
BIOLOGY
Unit 10: Ecology and Environment
Which one of the following is not a method in situ conservation of biodiversity?
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- A. Biosphere Reserve
- B. Wildlife Sanctuary
- C. Botanical Garden
- D. Sacred Grove
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Q106
BIOLOGY
Unit 10: Ecology and Environment
Which one of the following is not a method of in situ conservation of biodiversity?
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- A. Biosphere Reserve
- B. Wildlife Sanctuary
- C. Botanical Garden
- D. Sacred Grove
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Q107
BIOLOGY
Unit 7: Genetics and Evolution
In a species, the weight of newborn ranges from 2 to 5 kg. 97% of the newborn with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weight from 2 to 2.5 kg or 4.5 to 5 kg die. Which type of selection process is taking place?
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- A. Directional Selection
- B. Stabilizing Selection
- C. Disruptive Selection
- D. Cyclical Selection
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Q107
BIOLOGY
Unit 7: Genetics and Evolution
In a species, the weight of newborns ranges from 2 to 5 kg. 97% of the newborns with an average weight between 3 to 3.3 kg survive, whereas 99% of the infants born with weight from 2 to 2.5 kg or 4.5 to 5 kg die. Which type of selection process is taking place?
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2019 (4 sets)
- A. Directional selection
- B. Stabilizing selection
- C. Disruptive selection
- D. Cyclical selection
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Q108
BIOLOGY
Unit 3: Cell Structure and Function
The correct sequence of phases of cell cycle is:
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- A. M → G1 → G2 → S
- B. G1 → G2 → S → M
- C. S → G1 → G2 → M
- D. G1 → S → G2 → M
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Q108
BIOLOGY
Unit 3: Cell Structure and Function
The correct sequence of phases of cell cycle is:
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2019 (4 sets)
- A. M → G1 → G2 → S
- B. G1 → G2 → S → M
- C. S → G1 → G2 → M
- D. G1 → S → G2 → M
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Q109
BIOLOGY
Unit 5: Human Physiology
How does steroid hormone influence cellular activities?
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2019 (4 sets)
- A. Changing the permeability of the cell membrane
- B. Binding to DNA and forming a gene-hormone complex
- C. Activating cyclic AMP located on the cell membrane
- D. Using aquaporin channels as second messenger
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Q109
BIOLOGY
Unit 5: Human Physiology
How does a steroid hormone influence cellular activities?
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2019 (4 sets)
- A. Changing the permeability of the cell membrane
- B. Binding to DNA and forming a gene-hormone complex
- C. Activating cyclic AMP located on the cell membrane
- D. Using aquaporin channels as second messenger
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Q110
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following statements is not correct?
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2019 (4 sets)
- A. Lysosomes have numerous hydrolytic enzymes
- B. The hydrolytic enzymes of lysosomes are active under acidic pH
- C. Lysosomes are membrane bound structures
- D. Lysosomes are formed by the process of packaging in the endoplasmic reticulum
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Q111
BIOLOGY
Unit 6: Reproduction
Which one of the following statements regarding post-fertilization development in flowering plants is incorrect?
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2019 (3 sets)
- A. Ovary develops into fruit
- B. Zygote develops into embryo
- C. Central cell develops into endosperm
- D. Ovules develop into embryo sac
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Q112
BIOLOGY
Unit 8: Biology and Human Welfare
Concanavalin A is
- A. an alkaloid
- B. an essential oil
- C. a lectin
- D. a pigment
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Q113
BIOLOGY
Unit 8: Biology and Human Welfare
Which one of the following equipment is essentially required for growing microbes on a large scale, for industrial production of enzymes?
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2019 (1 set)
- A. BOD incubator
- B. Sludge digester
- C. Industrial oven
- D. Bioreactor
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Q114
BIOLOGY
Unit 8: Biology and Human Welfare
Consider the following statements: (A) Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group. (B) A complete catalytically active enzyme with its bound prosthetic group is called apoenzyme. Select the correct option.
- A. Both (A) and (B) are true.
- B. (A) is true but (B) is false.
- C. Both (A) and (B) are false.
- D. (A) is false but (B) is true.
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Q115
BIOLOGY
Unit 3: Cell Structure and Function
Purines found both in DNA and RNA are
- A. Adenine and thymine
- B. Adenine and guanine
- C. Guanine and cytosine
- D. Cytosine and thymine
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Q116
BIOLOGY
Unit 5: Human Physiology
Select the correct sequence for transport of sperm cells in the male reproductive system.
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- A. Testis → Epididymis → Vasa efferentia → Rete testis → Inguinal canal → Urethra
- B. Seminiferous tubules → Rete testis → Vasa efferentia → Epididymis → Vas deferens → Ejaculatory duct → Urethra → Urethral meatus
- C. Seminiferous tubules → Vasa efferentia → Epididymis → Inguinal canal → Urethra
- D. Testis → Epididymis → Vasa efferentia → Vas deferens → Ejaculatory duct → Inguinal canal → Urethra → Urethral meatus
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Q117
BIOLOGY
Unit 7: Genetics and Evolution
Match the hominids with their correct brain size: (a) Homo habilis, (b) Homo neanderthalensis, (c) Homo erectus, (d) Homo sapiens. Brain sizes: (i) 900 cc, (ii) 1350 cc, (iii) 650-800 cc, (iv) 1400 cc. Select the correct option.
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2019 (1 set)
- A. (a) (iii), (b) (i), (c) (iv), (d) (ii)
- B. (a) (iii), (b) (ii), (c) (i), (d) (iv)
- C. (a) (iii), (b) (iv), (c) (i), (d) (ii)
- D. (a) (iv), (b) (iii), (c) (i), (d) (ii)
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Q118
BIOLOGY
Unit 7: Genetics and Evolution
Variations caused by mutation, as proposed by Hugo de Vries are
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- A. random and directional
- B. random and directionless
- C. small and directional
- D. small and directionless
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Q119
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following pairs of organelles does not contain DNA?
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- A. Mitochondria and lysosomes
- B. Chloroplast and vacuoles
- C. Lysosomes and vacuoles
- D. Nuclear envelope and mitochondria
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Q120
BIOLOGY
Unit 5: Human Physiology
Due to increasing airborne allergens and pollutants, many people in urban areas are suffering from respiratory disorder causing wheezing due to
↻ Repeated question — also appeared in
2019 (3 sets)
- A. benign growth on mucous lining of nasal cavity
- B. inflammation of bronchi and bronchioles
- C. proliferation of fibrous tissues and damage of the alveolar walls
- D. reduction in the secretion of surfactants by pneumocytes
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Q121
BIOLOGY
Unit 7: Genetics and Evolution
Select the incorrect statement.
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2019 (3 sets)
- A. Male fruit fly is heterogametic
- B. In male grasshoppers 50% of sperms have no sex chromosome
- C. In domesticated fowls, sex of progeny depends on the type of sperm rather than egg
- D. Human males have one of their sex chromosomes much shorter than the other
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Q121
BIOLOGY
Unit 5: Human Physiology
Select the incorrect statement.
↻ Repeated question — also appeared in
2019 (2 sets)
- A. Male fruit fly is heterogametic
- B. In male grasshoppers, 50% of sperms have no sex-chromosome
- C. In domesticated fowls, sex of progeny depends on the type of sperm rather than egg
- D. Human males have one of their sex-chromosomes much shorter than the other
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Q122
PHYSICS
Unit 3: Laws of Motion
DNA precipitation out of a mixture of biomolecules can be achieved by treatment with
- A. Isopropanol
- B. Chilled ethanol
- C. Methanol at room temperature
- D. Chilled chloroform
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Q122
CHEMISTRY
Unit 20: Principles Related to Practical Chemistry
DNA precipitation out of a mixture of biomolecules can be achieved by treatment with
- A. Isopropanol
- B. Chilled ethanol
- C. Methanol at room temperature
- D. Chilled chloroform
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Q123
BIOLOGY
Unit 8: Biology and Human Welfare
Select the correct group of biocontrol agents.
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2019 (3 sets)
- A. Bacillus thuringiensis, Tobacco mosaic virus, Aphids
- B. Trichoderma, Baculovirus, Bacillus thuringiensis
- C. Oscillatoria, Rhizobium, Trichoderma
- D. Nostoc, Azospirillum, Nucleopolyhedrovirus
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Q123
BIOLOGY
Unit 9: Biotechnology and Its Applications
Select the correct group of biocontrol agents.
- A. Bacillus thuringiensis, Tobacco mosaic virus, Aphids
- B. Trichoderma, Baculovirus, Bacillus thuringiensis
- C. Oscillatoria, Rhizobium, Trichoderma
- D. Nostoc, Azospirillum, Nucleopolyhedrovirus
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Q124
BIOLOGY
Unit 6: Reproduction
Select the incorrect statement.
- A. Inbreeding increases homozygosity
- B. Inbreeding is essential to evolve pure lines in any animal
- C. Inbreeding selects harmful recessive genes that reduce fertility and productivity
- D. Inbreeding helps in accumulation of superior genes and elimination of undesirable genes
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Q125
BIOLOGY
Unit 9: Biotechnology and Its Applications
Match the following organisms with the products they produce:
(a) Lactobacillus
(b) Saccharomyces cerevisiae
(c) Aspergillus niger
(d) Acetobacter aceti
Select the correct option.
- A. (a)-(ii), (b)-(iv), (c)-(v), (d)-(iii)
- B. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(v)
- C. (a)-(iii), (b)-(iv), (c)-(v), (d)-(i)
- D. (a)-(ii), (b)-(i), (c)-(iii), (d)-(v)
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Q126
BIOLOGY
Unit 5: Human Physiology
What is the direction of movement of sugars in phloem?
- A. Non-multidirectional
- B. Upward
- C. Downward
- D. Bi-directional
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Q127
BIOLOGY
Unit 6: Reproduction
In some plants, the female gamete develops into embryo without fertilization. This phenomenon is known as
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Autogamy
- B. Parthenocarpy
- C. Syngamy
- D. Parthenogenesis
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Q128
BIOLOGY
Unit 6: Reproduction
Persistent nucellus in the seed is known as
↻ Repeated question — also appeared in
2019 (2 sets)
- A. Chalaza
- B. Perisperm
- C. Hilum
- D. Tegmen
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Q129
BIOLOGY
Unit 7: Genetics and Evolution
What map unit (Centimorgan) is adopted in the construction of genetic maps?
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2019 (3 sets)
- A. A unit of distance between two expressed genes representing 10% cross over
- B. A unit of distance between two expressed genes representing 100% cross over
- C. A unit of distance between genes on chromosomes, representing 1% cross over
- D. A unit of distance between genes on chromosomes, representing 50% cross over
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Q130
BIOLOGY
Unit 5: Human Physiology
What would be the heart rate of a person if the cardiac output is 5 L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL?
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2019 (3 sets)
- A. 50 beats per minute
- B. 75 beats per minute
- C. 100 beats per minute
- D. 125 beats per minute
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Q131
BIOLOGY
Unit 5: Human Physiology
Thiobacillus is a group of bacteria helpful in carrying out
- A. Nitrogen fixation
- B. Chemoautotrophic fixation
- C. Nitrification
- D. Denitrification
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Q132
BIOLOGY
Unit 5: Human Physiology
Which of the following factors is responsible for the formation of concentrated urine?
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2019 (3 sets)
- A. Low levels of antidiuretic hormone
- B. Maintaining hyperosmolarity towards inner medullary interstitium in the kidneys
- C. Secretion of erythropoietin by juxtaglomerular complex
- D. Hydrostatic pressure during glomerular filtration
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Q133
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following statements regarding mitochondria is incorrect?
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2019 (3 sets)
- A. Outer membrane is permeable to monomers of carbohydrates, fats and proteins
- B. Enzymes of electron transport are embedded in outer membrane
- C. Inner membrane is convoluted with infoldings
- D. Mitochondrial matrix contains single circular DNA molecule and ribosomes
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Q134
BIOLOGY
Unit 4: Plant Physiology
Xylem translocates
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- A. Water only
- B. Water and mineral salts only
- C. Water, mineral salts and some organic nitrogen only
- D. Water, mineral salts, some organic nitrogen and hormones
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Q135
BIOLOGY
Unit 3: Cell Structure and Function
Cell in G0 phase:
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- A. exit the cell cycle
- B. enter the cell cycle
- C. suspend the cell cycle
- D. terminate the cell cycle
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Q135
BIOLOGY
Unit 5: Human Physiology
Cell in G0 phase:
- A. exit the cell cycle
- B. enter the cell cycle
- C. suspend the cell cycle
- D. terminate the cell cycle
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Q136
BIOLOGY
Unit 4: Plant Physiology
Which of the statements given below is not true about formation of annual rings in trees?
- A. Annual ring is a combination of spring wood and autumn wood produced in a year
- B. Differential activity of cambium causes light and dark bands of tissue early and late wood respectively
- C. Activity of cambium depends upon variation in climate
- D. Annual rings are not prominent in trees of temperate region
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Q136
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Which of the statements given below is not true about formation of annual rings in trees?
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2019 (3 sets)
- A. Annual ring is a combination of spring wood and autumn wood produced in a year
- B. Differential activity of cambium causes light and dark bands of tissue early and late wood respectively.
- C. Activity of cambium depends upon variation in climate.
- D. Annual rings are not prominent in trees of temperate region.
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Q137
BIOLOGY
Unit 10: Ecology and Environment
Which of the following ecological pyramids is generally inverted?
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- A. Pyramid of numbers in grassland
- B. Pyramid of energy
- C. Pyramid of biomass in a forest
- D. Pyramid of biomass in a sea
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Q137
BIOLOGY
Unit 10: Ecology and Environment
Which of the following ecological pyramids is generally inverted?
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2019 (4 sets)
- A. Pyramid of numbers in grassland
- B. Pyramid of energy
- C. Pyramid of biomass in a forest
- D. Pyramid of biomass in a sea
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Q138
BIOLOGY
Unit 6: Reproduction
Placentation in which ovules develop on the inner wall of the ovary or in peripheral part, is
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- A. Basal
- B. Axile
- C. Parietal
- D. Free central
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Q139
BIOLOGY
Unit 10: Ecology and Environment
Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere?
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- A. Montreal Protocol
- B. Kyoto Protocol
- C. Gothenburg Protocol
- D. Geneva Protocol
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Q139
BIOLOGY
Unit 10: Ecology and Environment
Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere?
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- A. Montreal Protocol
- B. Kyoto Protocol
- C. Gothenburg Protocol
- D. Geneva Protocol
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Q140
BIOLOGY
Unit 6: Reproduction
Which of the following contraceptive methods do involve a role of hormone?
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2019 (3 sets)
- A. Lactational amenorrhea, Pills, Emergency contraceptives.
- B. Barrier method, Lactational amenorrhea, Pills.
- C. CuT, Pills, Emergency contraceptives.
- D. Pills, Emergency contraceptives, Barrier methods.
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Q141
BIOLOGY
Unit 5: Human Physiology
Tidal volume and expiratory reserve volume of an athlete is 500 mL and 1000 mL, respectively. What will be his expiratory capacity if the residual volume is 1200 mL?
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2019 (3 sets)
- A. 1500 mL
- B. 1700 mL
- C. 2200 mL
- D. 2700 mL
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Q142
BIOLOGY
Unit 6: Reproduction
What is the fate of the male gametes discharged in the synergid?
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- A. One fuses with egg; other(s) degenerate in the synergid.
- B. All fuse with the egg.
- C. One fuses with the egg, other(s) fuse(s) with synergid nucleus.
- D. One fuses with the egg and other fuses with central cell nuclei.
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Q143
BIOLOGY
Unit 4: Plant Physiology
What is the site of perception of photoperiod necessary for induction of flowering in plants?
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2019 (3 sets)
- A. Lateral buds
- B. Pulvinus
- C. Shoot apex
- D. Leaves
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Q144
BIOLOGY
Unit 1: Diversity in Living World
Select the correctly written scientific name of Mango which was first described by Carolus Linnaeus:
↻ Repeated question — also appeared in
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- A. Mangifera indica Car. Linn.
- B. Mangifera indica Linn.
- C. Mangifera indica
- D. Mangifera Indica
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Q145
PHYSICS
Unit 3: Laws of Motion
Following statements describe the characteristics of the enzyme restriction endonuclease. Identify the incorrect statement.
- A. The enzyme cuts DNA molecule at identified position within the DNA.
- B. The enzyme binds DNA at specific sites and cuts only one of the two strands.
- C. The enzyme cuts the sugar-phosphate backbone at specific sites on each strand.
- D. The enzyme recognizes a specific palindromic nucleotide sequence in the DNA.
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Q146
BIOLOGY
Unit 1: Diversity in Living World
From evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in:
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Liverworts
- B. Mosses
- C. Pteridophytes
- D. Gymnosperms
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Q147
BIOLOGY
Unit 7: Genetics and Evolution
In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F1 generation pink flowers were obtained. When pink flowers were selfed, the F2 generation showed white, red and pink flowers. Choose the incorrect statement from the following:
↻ Repeated question — also appeared in
2019 (3 sets)
- A. This experiment does not follow the Principle of Dominance.
- B. Pink colour in F1 is due to incomplete dominance.
- C. Ratio of F2 is 1/4 (Red) : 2/4 (Pink) : 1/4 (White)
- D. Law of Segregation does not apply in this experiment
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Q148
BIOLOGY
Unit 5: Human Physiology
Conversion of glucose to glucose-6-phosphate, the first irreversible reaction of glycolysis, is catalyzed by
- A. Aldolase
- B. Hexokinase
- C. Enolase
- D. Phosphofructokinase
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Q149
BIOLOGY
Unit 8: Biology and Human Welfare
Drug called 'Heroin' is synthesized by
↻ Repeated question — also appeared in
2019 (3 sets)
- A. methylation of morphine
- B. acetylation of morphine
- C. glycosylation of morphine
- D. nitration of morphine
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Q150
BIOLOGY
Unit 6: Reproduction
Select the hormone-releasing intra-uterine devices.
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2019 (1 set)
- A. Vaults, LNG-20
- B. Multiload 375, Progestasert
- C. Progestasert, LNG-20
- D. Lippes Loop, Multiload 375
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Q150
BIOLOGY
Unit 6: Reproduction
Select the hormone-releasing intra-uterine devices.
- A. Vaults, LNG-20
- B. Multiload 375, Progestasert
- C. Progestasert, LNG-20
- D. Lippes Loop, Multiload 375
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Q151
BIOLOGY
Unit 7: Genetics and Evolution
A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?
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2019 (4 sets)
- A. 0.36(AA); 0.48(Aa); 0.16(aa)
- B. 0.16(AA); 0.24(Aa); 0.36(aa)
- C. 0.16(AA); 0.48(Aa); 0.36(aa)
- D. 0.16(AA); 0.36(Aa); 0.48(aa)
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