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TesT – 2 (2021-22), , FOR CLAss XII ALPHA MeDICAL, , PHYsICs, CHeMIsTRY & BIOLOgY, 1., , Class : 12th ALPHA MEDICAL, , A ball hits the floor and rebounds after, inelastic collision. In this case, (a) The momentum of the ball just after the, collision is the same as that just before the, collision, , (c), 5., , (b) The mechanical energy of the ball remains, the same in the collision, (c) The total momentum of the ball and the, earth is conserved, (d) The total energy of the ball and the earth is, conserved, 2., , A uniform chain of length L and mass M is lying, on a smooth table and one third of its length is, hanging vertically down over the edge of the, table. If g is acceleration due to gravity, the, work required to pull the hanging part on to, the table is [IIT 1985; MNR 1990; AIEEE 2002;, , 6., , MP PMT 1994, 97, 2000; JIPMER 2000], (a) MgL, (b) MgL/3, (c) MgL/9, 3., , (d) MgL/18, , If W1 ,W2 and W3 represent the work done in, moving a particle from A to B along three, different paths 1, 2 and 3 respectively (as 7., shown) in the gravitational field of a point, mass m, find the correct relation between, W1 ,W2 and W3, [IIT-JEE Screening 2003], B, , 4., , (a), , W1 W2 W3, , (b), , W1 W2 W3, , (c), , W1 W2 W3, , (d), , W2 W1 W3, , 1, , 2, , 8., , A, , A particle of mass m is moving in a horizontal, circle of radius r under a centripetal force, equal to K / r 2 , where K is a constant. The, total energy of the particle is, [IIT 1977], (a), , K, 2r, , (b), , , , K, 2r, , (d), , If g is the acceleration due to gravity on the, earth's surface, the gain in the potential, energy of an object of mass m raised from the, surface of earth to a height equal to the radius, of the earth R, is, [IIT 1983], 1, mgR, 2, , (c) mgR, , 3, , M.M:720, K, r, , The displacement x of a particle moving in one, dimension under the action of a constant force, is related to the time t by the equation, t x 3 , where x is in meters and t is in, seconds. The work done by the force in the, first 6 seconds is, [IIT 1979], (a) 9 J, (b) 6 J, (c) 0 J, (d) 3 J, A force F K (y i x j ) (where K is a positive, constant) acts on a particle moving in the xyplane. Starting from the origin, the particle is, taken along the positive x-axis to the point (a,, 0) and then parallel to the y-axis to the point, (a, a). The total work done by the force F on, the particles is, ., (a) 2Ka 2, (b) 2Ka 2, (c) Ka 2, (d) Ka 2, , (a), , m, , K, , r, , (b) 2 mgR, (d), , 1, mgR, 4, , A lorry and a car moving with the same K.E., are brought to rest by applying the same, retarding force, then, (a) Lorry will come to rest in a shorter distance, (b) Car will come to rest in a shorter distance, (c) Both come to rest in a same distance, (d) None of the above, , RPs PUBLIC sCHOOL ReWARI, , Page - 1, , Date: 09/02/2022
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TesT – 2 (2021-22), , 10., , 11., , A particle free to move along the x-axis has, potential energy given by U( x ) k[1 exp( x )2 ] for, x , where k is a positive constant of, appropriate dimensions. Then, (a) At point away from the origin, the particle, is in unstable equilibrium, (b) For any finite non-zero value of x, there is a, force directed away from the origin, (c) If its total mechanical energy is k/2, it has, its minimum kinetic energy at the origin, (d) For small displacements from x = 0, the, motion is simple harmonic, The kinetic energy acquired by a mass m in, travelling a certain distance d starting from, rest under the action of a constant force is, directly proportional to [CBSE PMT 1994], (a) m, (b) Independent of m, (c) 1 / m, (d) m, An open knife edge of mass 'm' is dropped, from a height 'h' on a wooden floor. If the, blade penetrates upto the depth 'd' into the, wood, the average resistance offered by the, wood to the knife edge is, (a), (c), , 12., , 13., , mg, h, , mg 1 , d, , , (b), (d), , h, , mg 1 , d, , , h, , mg 1 , d, , , 14., , 15., , (a), , 3v cos , , (b), , (c), , 3, v cos , 2, , (d), , 2v cos , , 3, v cos , 2, , A vessel at rest explodes into three pieces., Two pieces having equal masses fly off, perpendicular to one another with the same, velocity 30 meter per second. The third piece, has three times mass of each of other piece., The magnitude and direction of the velocity of, the third piece will be, (a) 10, , 2 m / second, , (b), , 10 2 m / second, , (c), , 10, 2, , m / second, , and 135° from either, and 45° from either, , and 135° from either, , (d) 10 m / second and 45° from either, 2, [BHU 2002], 16., , 2, , Consider the following two statements, 1. Linear momentum of a system of particles, is zero, 2. Kinetic energy of a system of particles is, zero, Then, [AIEEE 2003], (a) 1 implies 2 and 2 implies 1, (b) 1 does not imply 2 and 2 does not imply 1, (c) 1 implies 2 but 2 does not imply 1, (d) 1 does not imply 2 but 2 implies 1, A body is moved along a straight line by a, machine delivering constant power. The, distance moved by the body in time t is, proportional to, [IIT 1984; BHU 1984, 95; MP PET, 1996; JIPMER 2000; AMU (Med.) 1999], 1/2, (a) t, (b) t 3 / 4, (c) t 3 / 2, (d) t 2, , A shell is fired from a cannon with velocity v, m/sec at an angle with the horizontal, direction. At the highest point in its path it, explodes into two pieces of equal mass. One of, the pieces retraces its path to the cannon and, the speed in m/sec of the other piece, immediately after the explosion is, , A particle P moving with speed v undergoes a, head -on elastic collision with another particle, Q of identical mass but at rest. After the, collision, [Roorkee 2000], (a) Both P and Q move forward with speed, , v, 2, , (b) Both P and Q move forward with speed, v, 2, , (c) P comes to rest and Q moves forward with, speed v, (d) P and Q move in opposite directions with, speed, , v, 2, , UNIFORM MOTION, 17., , A person travels along a straight road for half, the distance with velocity v1 and the, remaining half distance with velocity v 2 The, average velocity is given by, [MP PMT 2001], (a), , v1v 2, , RPs PUBLIC sCHOOL ReWARI, , (b), , v 22, v12, , Page - 2, , 9., , FOR CLAss XII ALPHA MeDICAL
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TesT – 2 (2021-22), , (c), , (d), , 2v1v 2, v1 v 2, , The displacement-time graph for two particles, A and B are straight lines inclined at angles of, 30 o and 60 o with the time axis. The ratio of, velocities of V A : VB is, , [CPMT 1990; MP PET 1999; MP PET 2001; Pb. PET, 2003], (a) 1 : 2, (b) 1 : 3, (c) 3 : 1, (d) 1 : 3, 19., A car travels from A to B at a speed of, 20 km / hr and returns at a speed of 30 km / hr ., The average speed of the car for the whole, journey is, [MP PET 1985], (a) 25 km / hr, (b) 24 km / hr, (c), 20., , 21., , 22., , 24., , (d), , 26., , 27., , 5 km / hr, , A particle is constrained to move on a straight, line path. It returns to the starting point after, 10 sec. The total distance covered by the, particle during this time is 30 m. Which of the, following statements about the motion of the, particle is false [CBSE PMT 2000; AFMC 2001], , A boy walks to his school at a distance of 6 km, with constant speed of 2.5 km/hour and walks, back with a constant speed of 4 km/hr. His, average speed for round trip expressed in, (a) Displacement of the particle is zero, km/hour, is, [AIIMS 1995], (b) Average speed of the particle is 3 m/s, (a) 24/13, (b) 40/13, (c) 3, (d) 1/2, (c) Displacement of the particle is 30 m, A car travels the first half of a distance, (d) Both (a) and (b), between two places at a speed of 30 km/hr, 28., A man walks on a straight road from his home, and the second half of the distance at 50, to a market 2.5 km away with a speed of 5, km/hr. The average speed of the car for the, whole journey is, [Manipal MEE 1995; AFMC 1998] km/h. Finding the market closed, he instantly, turns and walks back home with a speed of 7.5, (a) 42.5 km/hr, (b) 40.0 km/hr, km/h. The average speed of the man over the, (c) 37.5 km/hr, (d) 35.0 km/hr, interval of time 0 to 40 min. is equal to, One car moving on a straight road covers one, third of the distance with 20 km/hr and the, (a) 5 km/h, (b) 25 km/h, 4, rest with 60 km/hr. The average speed is [MP PMT 1999; CPMT 2002], (a) 40 km/hr, (b) 80 km/hr, (c) 30 km/h, (d) 45 km/h, (c), , 23., , 50 km / hr, , 25., , (c) 48, (d) 70, Which of the following is a one dimensional, motion, [BHU 2000; CBSE PMT 2001], (a) Landing of an aircraft, (b) Earth revolving a round the sun, (c) Motion of wheels of a moving trains, (d) Train running on a straight track, A 150 m long train is moving with a uniform, velocity of 45 km/h. The time taken by the, train to cross a bridge of length 850 meters is, (a) 56 sec, (b) 68 sec, (c) 80 sec, (d) 92 sec, , 46, , 2, 3, , km/hr, , (d) 36 km/hr, , A car moves for half of its time at 80 km/h and, for rest half of time at 40 km/h. Total distance, covered is 60 km. What is the average speed of, the car, [RPET 1996], (a) 60 km / h, (b) 80 km / h, (c) 120 km / h, (d) 180 km / h, A train has a speed of 60 km/h. for the first, one hour and 40 km/h for the next half hour., Its average speed in km/h is, [JIPMER 1999], (a) 50, (b) 53.33, , 4, , 29., , [, , 8, , The ratio of the numerical values of the, average velocity and average speed of a body, is always, [MP PET 2002], (a) Unity, , (b) Unity or less, , (c) Unity or more, , (d) Less than unity, , RPs PUBLIC sCHOOL ReWARI, , Page - 3, , 18., , v1 v 2, 2, , FOR CLAss XII ALPHA MeDICAL
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TesT – 2 (2021-22), , Which of the following options is correct for, the object having a straight line motion, represented by the following graph, , (a) Increasing with time, 36., , D, C, B, , t, A, O, , s, , (a) The object moves with constantly, increasing velocity from O to A and then it, moves with constant velocity., , 37., , (c) Average velocity is zero, , 33., , S1S 2, , (c), , S1 S 2, , (d), , S1 / S 2, , A body under the action of several forces will, have zero acceleration, , 38., , A body starts from the origin and moves along, the X-axis such that the velocity at any instant is, given by (4 t 3 2 t) , where t is in sec and velocity, in m / s . What is the acceleration of the particle,, when it is 2 m from the origin, , S1 S 2, , (b), , S1 S 2 / 3, , (a), , 28 m / s 2, , (b), , 22 m / s 2, , (c), , S1 S 2 / 2, , (d), , S1 S 2 / 4, , (c), , 12 m / s 2, , (d), , 10 m / s 2, , The displacement x of a particle along a 39., straight line at time t is given by, x a 0 a1 t a 2 t 2 . The acceleration of the, particle is [NCERT 1974; RPMT 1999; AFMC 1999], , The relation between time and distance is, t x 2 x , where and are constants. The, retardation is, , (a), , a0, , (b), , a1, , (a) 2v, , (c), , 2a 2, , (d), , a2, , (c), , [NCERT 1982; AIEEE 2005], 3, , 2v 3, , (b), , 2 v 3, , (d), , 2 2v 3, , The coordinates of a moving particle at any 40. A point moves with uniform acceleration and, v 1 , v 2 and v 3 denote the average velocities in, time are given by x at 2 and y bt 2 . The speed, three, successive intervals of time t1 , t 2 and, of the particle at any moment is, [DPMT 1984; the, CPMT, 1997], t 3 . Which of the following relations is correct, (a) 2 t(a b ), (b) 2 t (a 2 b 2 ), t a2 b 2, , (d), , 2 t (a 2 b 2 ), , An electron starting from rest has a velocity, that increases linearly with the time that is, v kt ,, where k 2m / sec 2 . The distance, travelled in the first 3 seconds will be, [NCERT 1982], (a) 9, , m, , (c) 27, 35., , (b), , (a), , (c), 34., , S1 S 2, , (d) When the vector sum of all the forces, acting on it is zero, , [NCERT 1972; CPMT 1997; MP PMT 2002], , 32., , (a), , (c) When the body is a point body, , (d) The graph shown is impossible, A particle experiences a constant acceleration, for 20 sec after starting from rest. If it travels a, distance S1 in the first 10 sec and a distance, S 2 in the next 10 sec, then, , (c) Constant but not zero (d), Zero, [DCE, 2004], A body is moving from rest under constant, acceleration and let S 1 be the displacement in, the first ( p 1) sec and S 2 be the displacement, in the first p sec . The displacement in, ( p 2 p 1)th sec. will be, , (a) When the body is very light, (b) When the body is very heavy, , (b) Velocity of the object increases uniformly, , 31., , (b)Decreasing with time, , m, , (b) 16, , m, , (d) 36, , m, , The displacement of a body is given to be, proportional to the cube of time elapsed. The, magnitude of the acceleration of the body is, , 41., , (a), , (v 1 v 2 ) : (v 2 v 3 ) (t 1 t 2 ) : (t 2 t 3 ), , (b), , (v 1 v 2 ) : (v 2 v 3 ) (t 1 t 2 ) : (t 2 t 3 ), , (c), , (v 1 v 2 ) : (v 2 v 3 ) (t 1 t 2 ) : (t1 t 3 ), , (d), , (v 1 v 2 ) : (v 2 v 3 ) (t 1 t 2 ) : (t 2 t 3 ), , The acceleration of a moving body can be, found from, , [DPMT 1981], (a) Area under velocity-time graph, (b) Area under distance-time graph, (c) Slope of the velocity-time graph, [NCERT 1990], , RPs PUBLIC sCHOOL ReWARI, , Page - 4, , 30., , FOR CLAss XII ALPHA MeDICAL
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TesT – 2 (2021-22), , FOR CLAss XII ALPHA MeDICAL, , (d) Slope of distance-time graph, The initial velocity of a particle is u (at t 0 ), and the acceleration f is given by at . Which of, the following relation is valid, (a), , 43., , v u a, , t2, 2, , 50 m, , (d), , 75 m, , A motor car moving with a uniform speed of, 20 m / sec comes to stop on the application of, brakes after travelling a distance of 10 m Its, acceleration is, [EAMCET 1979], 2, (a) 20 m / sec, (b) 20m / sec 2, (c), , 45., , (b), , (c) v u at, (d) v u, The initial velocity of the particle is 10 m / sec, and its retardation is 2m / sec 2 . The distance, moved by the particle in 5 th second of its, motion is, [CPMT 1976], (a) 1 m, (b) 19 m, (c), , 44., , v u at 2, , [CPMT 1981; BHU 1995], , 40 m / sec 2, , (d), , 2m / sec 2, , The initial velocity of a body moving along a, straight line is 7 m / s . It has a uniform, acceleration of 4 m / s 2 . The distance covered, by the body in the 5th second of its motion is, (a) 25 m, (b) 35 m, (c) 50 m, (d) 85 m, , [MP PMT 1994], , Page - 5, , 42., , RPs PUBLIC sCHOOL ReWARI
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TesT – 2 (2021-22), , FOR CLAss XII ALPHA MeDICAL, , 46. Overlap of which of the following atomic orbitals would 57. According to modern periodic law, the physical and, be maximum to give the strongest covalent bond?, (1) 2p – 2p(), (2) 2p – 2p(), (3) 1s – 2s(), (4) 1s – 2p(), , 47. The correct order of second ionisation energy of, carbon, nitrogen, oxygen and fluorine is, (1) O > F > N > C, (2) F > O > N > C, (3) C > O > N > F, (4) O > N > F > C, , 48. Which one of the following orders of bond angles is, (2) PH3 < PF3, (4) H2O < OF2, , 49. The maximum F – Xe – F bond angle in XeOF2 is, (1) 90°, (3) 150°, , (2) 120°, (4) 180°, , 50. Which of the following species has one lone pair of, electrons in the valence shell of the central atom?, (1) XeF4, (2) SiF4, (3) BrF3, (4) SF4, , 51. Which of the following is most covalent?, (1) Na2S, (3) MgS, , (2) MgCl2, (4) NaCl, , 52. Which one of the following elements/ions has positive, electron gain enthalpy?, (1) B, (3) S, , (2) N, (4) O, , +, , (2) N2, , (4), , N22–, , 54. Which one of the following has highest dipole, moment?, (1) CH3 – F, (3) CH3 – Br, , (2) CH3 – Cl, (4) CH3 – I, , 55. What is the hybridisation of S-atom in S8 molecule?, 3, , (1) Sp, (2) Sp, , (1) 3, (3) 5, , (2) 4, (4) 6, , 59. General electronic configuration of d-block elements is, 1–10, , 0–2, , (1) nd, ns, 1–10, 2, (3) nd, (n – 1) s, , 1–10, , 0–2, , (2) (n – 1) d, ns, 1–10, 1–2, (4) nd, (n – 1) s, , 60. Minimum ionic radii among the following is of, +, , (1) K, 2–, (3) O, , 3+, , (2) Al, 2–, (4) S, , 61. Correct order of decreasing negative electron gain, enthalpy is, (1) S > Se > Te > O, (3) O > S > Se > Te, , (2) S > O > Se > Te, (4) Te > S > Se > O, , 62. Neutral oxide among the following is, (1) CO, (3) N2O, , (2) NO, (4) All of these, , 63. Correct order of ionisation enthalpies is, (1) Li < Be < B < C, (3) Li < C < B < Be, , (2) Li < B < Be < C, (4) Be < Li < B < C, , 64. The hybridisation of Cl in ClF3 is, 3, , (1) sp d, 3, (3) sp, , 3 2, , (2) sp d, 2, (4) dsp, , 65. Which among the given pairs does not have identical, , 53. Which one among the following species has longest, bond length?, (1) N2, –, (3) N2, , 58. In which period, Lanthanoid series is present?, , 2, , (2) sp, 2, (4) dsp, , 56. Pick out the isostructural species having similar shape, from the following, I. NH2, III. XeF2, , II. OF2, IV. CS2, , (1) II and III, (3) I and II, , (2) III and IV, (4) II, III and IV, , bond order?, (1) O and F2, (3) N2 and CO, , (2) CO and NO, +, (4) N2 and NO, , 66. Zero overlap takes place between which of the, following, if x-axis is the inter-nuclear axis?, (1) 1s and 2s, (2) 2px and 2s, (3) 2px and 2py, (4) 2px and 1s, *, , 67. In the given compound CH3 − CH = C = CH2 ,, hybridisation of the marked carbon atom is, 2, (1) sp, (2) sp, 3, 2, (3) sp, (4) dsp, , 68. Which of the following molecular orbitals does not, contain nodal plane?, (1) σ1s, (3) π*2px, , (2) σ*1s, (4) σ*2pz, , 69. Which of the following species contains onlyπ bond?, (1) H2, (3) N2, , (2) C2, (4) O2, , 70. Paramagnetic species among the following is, , RPs PUBLIC sCHOOL ReWARI, , Page - 6, , correct?, (1) NH3 < NF3, (3) BF3 < BCl3, , chemical properties of the element are periodic, function of, (1) Atomic number, (2) Atomic mass, (3) Mass number, (4) Number of neutrons
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TesT – 2 (2021-22), (1) 𝑁, (3) O2, , FOR CLAss XII ALPHA MeDICAL, (2) 𝑁, (4) All of these, , 71. Which of the following molecules does not exist?, (1) He2, (3) Be2, , (2) H2, (4) Both (1) and (3), , 72. Strongest H-bonding takes place in, (1) HF, (3) NH3, , (2) H2O, (4) CH3OH, , 74. Dipole-dipole interactions are present in which of the, (2) H2O and HCl, (4) He and Ne, , 75. Molecule or ion having bond order equal to 2.5 is, (1) N2, +, (3) NO, , (2) CO, (4) 𝑁, , 76. Linear molecule among the following is/are, (1) BeCl2, (3) HgCl2, , (2) Na+ < Mg2+ < Al3+, (4) Na+ < Mg2+ > Al3+, , 84. IE1, IE2, IE3, IE4 and IE5 are 6.9, 13.9, 33.5, 46.2, and 172 eV respectively. The element is most, likely to be, (1) Al, (2) Ca, (3) Si, (4) Mg, , of bond length?, , (2) 𝑂, (4) 𝑂, , following pairs?, (1) HCl and CCl4, (3) H2O and Ne, , (1) Na+ = Mg2+ = Al3+, (3) Na+ > Mg2+ > Al3+, , 85. Which of the following changes will result in increase, , 73. Minimum bond length is in, (1) O2, (3) 𝑂, , 83. Correct order of Zeff for species Na+, Mg2+, Al3+ is, , (2) CO2, (4) All of these, , 77. Select the incorrect statement regarding PCl5, 3, , (1) P is sp d hybridised, (2) Geometry is trigonal bipyramidal, (3) All P – Cl bonds are equivalent, (4) P expands its octet, , (1) NO NO , , (2) CO CO , , (3) N 2 N 2, , (4) Both (2) and (3), , 86. Which among the following is an electron deficient, molecule?, (1) SiH4, (3) B2H6, , (2) H2S, (4) IF7, , 87. The element having maximum value for its 3rd, ionisation enthalpy is, (1) B, (2) Be, , (3) Al, , (4) C, , 88. Which among the following has maximum bond, angle?, 2, , (1) CO3, , (2) CO2, , (3) CH4, , (4) CCl4, , 89. The incorrect statement among the following is, (1) 0, (3) 0.5, , (2) 1, (4) 1.5, , 79. Which pair of elements shows diagonal relationship?, (1) Li, Al, (3) Be, Mg, , (2) Li, Mg, (4) Na, Mg, , 80. Which of the following arrangement is not correct?, (1) Rb > K > Na (Metallic radius), (2) F > Cl > Br (Electronegativity), (3) F > Cl > Br (Electron gain enthalpy), (4) Rb > K > Na (Metallic nature), , 81. The pair which is isoelectronic and isostructural is, (1) BO , PO, (2) SO , PO, (3) CO, , , NO, , (4) NO , SO, , 82. The pair of species with same hybridisation of central, atom is, (1) XeF4, SF4, (3) XeF6, SF4, , (2) XeF4, SF6, (4) XeF6, SF6, , (1) NH5 and PH5 do not exist, –, (2) I3 is linear in shape, (3) pπ – pπ bonds are present in SiCl4, (4) CH4 and SiCl4 have same shape, , 90. Intramolecular hydrogen bond is absent in, (1), , (2), , (3), , (4), , 91. Choose the correct statement., (1) Thylakoid membranes lack NADP reductase, enzyme and PS-I, (2) Membrane or lamellae of the grana have both PS, II and PS I, (3) PS I and PS II are not interconnected through, electron carriers, (4) NADP reductase enzyme is located on lumen side, of thylakoid membrane, , 92. Photorespiration is a wasteful process because, (1) CO2 and O2 both compete for binding with the, enzyme RuBisCO, (2) There is no synthesis of ATP or NADPH, , RPs PUBLIC sCHOOL ReWARI, , Page - 7, , 78. Bond order of H ion is
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TesT – 2 (2021-22), , FOR CLAss XII ALPHA MeDICAL, , (3) O2 is used in both chloroplast and peroxisome, (4) It can occur only in the presence of light, , 93. Chlorophyll-a molecule, (1) Is also known as shield pigment, (2) Shows absorption maxima in blue and red regions, of solar radiation, (3) Is yellow-green coloured in the chromatogram, (4) Is present in higher plants only, , 94. Cyclic photophosphorylation, A. Operates under low light intensity, anaerobic, conditions or in poor CO2 availability., B. Requires an external source of electrons., C. Occurs mainly in grana thylakoids., (1) Only C is incorrect, (2) Only B is incorrect, (3) Both B and C are incorrect, (4) Both A and B are incorrect, , 95. Calvin cycle, , 96. Which of the following is not a C4 acid?, (2) Malic acid, (4) Aspartic acid, , 97. Stroma lamellae lack, , 103. Plants with Kranz anatomy lack, (1) Double carboxylation steps in photosynthesis, (2) Cold sensitive enzyme PEP synthetase, (3) Activity of RuBisCO in mesophyll cells, (4) Agranal chloroplasts in bundle sheath cells, , development of a proton gradient., (1) Movement of proton across the membrane to, stroma through F0 part of ATPase, (2) Transport of protons from stroma to lumen as, electrons move through photosystem, (3) Removal of protons from stroma for reduction of, NADP+ to NADPH, (4) Accumulation of H+ within the lumen by splitting, of water molecules, , step of the Calvin cycle., (1) Is catalysed by the enzyme present in stroma, (2) Occurs even in those plants where fixing of CO2, into sugar is faciliated by C4 mechanism, (3) Utilises products of light reaction, (4) Requires CO2 and 5 C compound as substrate for, the most abundant enzyme on earth, , 99. Optimum temperature for bell pepper plant is, (2) 15 - 20°C, (4) 35 - 40°C, , 100. Find the incorrect statement for CAM plants., (1) These plants form sugar, only during day time, (2) PEPcase activity in these plants is observed at, night only, (3) They have scotoactive stomata, (4) C3 cycle does not occur in these plants, , 101. Which of these does not affect the rate of, , occurs inside, (1) Peroxisome only, (2) Mitochondria only, (3) Both peroxisome and chloroplast, (4) Both mitochondria and chloroplast, , 106. All of the given factors are plant factors which affect, photosynthesis, except, (1) Age of leaves, (2) Orientation of leaves, (3) Availability of water, (4) Amount of chlorophyll, , 107. Pacemaker enzyme of EMP pathway is, (1) Phosphohexoisomerase, (2) Hexokinase, (3) Phosphofructokinase, (4) Phosphotriose isomerase, , 108. During glucose activation phase of glycolysis, (1) NAD+ is converted to NADH + H+, (2) Energy is released, (3) There is conversion of glucose-6-phosphate to, fructose-6-phosphate, (4) Two molecules of pyruvic acid are formed., , 109. Which of the following is formed during TCA cycle?, , RPs PUBLIC sCHOOL ReWARI, , Page - 8, , 98. Choose the incorrect statement w.r.t. the most crucial, , photosynthesis?, (1) Light quality, , (1) For plants growing in shade or in dense forests, (2) Because there is a linear relationship between, incident light and CO2 fixation rates athigh light, intensities, (3) Because light saturation for photosynthesis, occurs at 10 percent of the full sunlight, (4) Because maximum photosynthesis occurs in red, wavelength of light, , 105. During photorespiration, deamination reaction, , (1) PS I only, (2) PS II only, (3) Both PS I and PS II, (4) PS II and NADP reductase, , (1) 20 - 25°C, (3) 10 - 15°C, , 102. Light is rarely a limiting factor in nature, , 104. Find the odd one w.r.t. processes lead to, , (1) Operates only in the night., (2) Was discovered using O18 isotope., (3) Occurs in all photosynthetic plants., (4) Is the photochemical phase of photosynthesis., , (1) Oxaloacetic acid, (3) Pyruvic acid, , (2) Duration of light, (3) Photosynthetic products accumulation, (4) Concentration of CO2
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TesT – 2 (2021-22), (2) Acetyl CoA, (4) FAD+, , 110. When apical bud of a plant is removed then, (1) Auxin shows apical dominance, (2) Cytokinin is removed along with auxin, (3) More lateral branches will be seen, (4) Root elongation is promoted, , 111. Which of the following is a 5 C compound?, (1) Acetyl CoA, (3) αketoglutaric acid, , (2) Fumaric acid, (4) Oxalosuccinic acid, , 112. Which of the given plants form leaves of different, shapes in different environmental conditions?, (1) Cotton, (2) Coriander, (3) Buttercup, (4) Larkspur, , 113. Arrange the following substrates in ascending order, w.r.t their R.Q values, a. Tripalmitin, b. Proteins, c. Malic acid, d. Glucose, (1) a, b, d & c, (2) b, d, a & c, (3) a, b, c & d, (4) d, a, b & c, , 114. Total number of ATP produced through ETS only, from one molecule of PGAL in aerobic respiration, is, (1) 5, (2) 20, (3) 17, (4) 10, , 115. Natural cytokinins are found in, (a) Young fruits, (b) Developing shoot buds, (c) Root apices, (1) Only a, (2) Only b and c, (3) Only c, (4) All a, b and c, , 116. In which of the following reactions of Krebs’ cycle, substrate level phosphorylationtakes place?, a. Malic acid → Oxaloacetic acid, b. PEP → Pyruvate, c. Succinyl CoA → Succinic acid, d. 3PGA → 2PGA, (1) b & c only, (2) b & d only, (3) b, c & d, (4) Only c, , 117. Most of the winter flowering plants like soyabean, and tobacco are, (1) SDP, (3) DNP, , (2) LDP, (4) Both (2) & (3), , 118. Select the incorrect statement about seed, germination., (1) In bean, hypocotyl grows actively and becomes, curved., (2) Tamarind shows hypogeal germination, (3) Rate of respiration increases rapidly during seed, germination, (4) Radicle is the first developed structure within the, seed., , 119. Select the odd one w.r.t. the day neutral plants., (1) Tomato, (3) Pepper, , (2) Radish, (4) Cucumber, , 120. Both ethylene and ABA______ abscission., (1) Accelerate, (2) Have no effect on, (3) Decrease, (4) First decrease and then increase, , 121. Who was credited with the discovery of auxins?, (1) Boysen-Jensen, (3) A. Paal, , (2) F.W. Went, (4) Charles Darwin, , 122. Triple response is shown by a hormone, (1) Called GA3, (2) Which is gaseous in nature, (3) Which was first discovered in human urine, (4) Called CK, , 123. Find the odd one out w.r.t synthetic auxins, (1) IBA, (3) NAA, , (2) 2, 4, 5-T, (4) 2, 4-D, , 124. Which of the following is incorrect w.r.t abscisic, acid?, (1) In most situations, it acts as an antagonistic, hormone to gibberellins, (2) It promotes bud dormancy during winters, (3) It helps in closing of stomata, (4) It helps in sprouting in potato, , 125. Match the columns w.r.t. precursors of PGRs, Column-I, a. ABA, b. Auxin, c. Gibberellin, d. Ethylene, , Column-II, (i) Terpene derivative, (ii) Methionine, (iii) Indole compounds, (iv) Violaxanthin, , (1) a(iv), b(iii), c(i), d(ii), (2) a(i), b(iii), c(ii), d(iv), (3) a(i), b(iv), c(iii), d(ii), (4) a(iv), b(ii), c(iii), d(i), , 126. Choose the odd one for alcoholic fermentation., (1) Net gain of H2O is zero, (2) Pyruvic acid is directly decarboxylated into, ethanol, (3) Occurs during incomplete breakdown of glucose, (4) Carried out by yeast and certain bacteria, , 127. The stimulus for vernalisation is perceived by, (1) Leaves, (3) Flower, , (2) Root, (4) Mature stem apex, , 128. Choose the odd one w.r.t redifferentiated tissues., (1) Secondary phloem, , RPs PUBLIC sCHOOL ReWARI, , (2) Phellem, , Page - 9, , (1) Pyruvic acid, (3) Succinic acid, , FOR CLAss XII ALPHA MeDICAL
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TesT – 2 (2021-22), (3) Phellogen, , FOR CLAss XII ALPHA MeDICAL, (4) Secondary cortex, , E - Haematocrit value is the volume occupied by, all the blood cells in blood., , 129. Dormancy of seeds cannot be broken by, , How many above statements are false ?, , (1) Scarification, (2) Exposure of high photoperiod, (3) Stratification, (4) Low temperature exposure + GA, 137., , 130. Choose the correct statement from the following, (1) The long day plant flowers when Pfr/Pr< 1., (2) Wheat is a day neutral plant., (3) All plants always require a critical photoperiod, more than 12 hrs., (4) Henbane shows flowering when it receives, photoperiod longer than critical period., , 138., , (2) 3, , (3) 4, , (4) 2, , If cardiac output of a person at a time is 6.4 litre, and his heart rate is 80 per minute, the stroke, volume of the person will be, (1) 52mL, , (2) 72mL, , (3) 80mL, , (4) 60mL, , Which of the following factors can cause, bradycardia?, (i) Sympathetic stimulation, , 131. By pruning of tea plants, the effect of which hormone, is decreased or nullified?, (1) ABA, (3) Auxin, , (1) 5, , (ii) Vagus stimulation, (iii) Adrenaline, , (2) Cytokinin, (4) Ethylene, , (iv) Acetylcholine, (v) Small quantity of Ca++ infusion in heart, , 132. Select the incorrect statement., (1) Glycolysis is oxygen independent pathway, (2) The plant parts respire at lower rates than, animals., (3) Lactic acid fermentation releases CO2, (4) The term glycolysis has originated from two, Greek words., , 139., , 133. A short day plant will flower only if, (1) Photoperiod more than critical period is given, (2) Its dark period is interrupted by a flash of light, (3) No dark period is given, (4) Photoperiod less than critical period in given, , 140., , (1) ii, iv, , (2) i, ii, iv, v, , (3) ii and v, , (4) iii and iv, , Chordae tendineae are special fibrous cords, attached to bicuspid and tricuspid valves and, their other ends are joined to, (1) Semilunar valve, , (2) Cardiac muscle, , (3) Papillary muscle, , (4) SA node, , Choose the incorrect set of comparison between, arteries and veins, Artery, , 134. The two hormones which are antagonistic to each, other regarding dormancy are, (1) ABA and GA, (2) IAA and CK, (3) ABA and CK, (4) IAA and GA, , (1) Valves absent, , Valves present, , (2) Blood pressure is low, high, , Blood pressure is, , (3) Thick muscular wall, , Thin, muscular wall, , (4) Carry blood away from, towards, , Carry blood, , heart, , 135. Phytochrome, (1) Is a colourless pigment, (2) Has Pfras physiologically acitve form, (3) Cannot detect light, (4) Can absorb green light only, , 141., , Vein, , the heart, , Erythroblastosis foetalis can be avoided by, (1) Administering anti-Rh antibodies to mother, immediately after conception, , 136., , Read the following statements (A-E), , (3) Artificially introducing Rh +ve blood into, present mother, , A - Mammalian RBCs appear biconcave,, enucleated and disc-like after maturation with few, exceptions., , (4) Administering anti-Rh antibodies to mother's, blood immediately after delivery of each Rh, positive child, , B - In human erythroproesis starts in red, bonemarrow in early stage, C - Myeloid elements are found inside bone, marrow., D - If RBC is placed in distilled water, then it, shrinks gradually leading to plasmolysis., , 142., , Which of the following is correct about the, function of renal tubule?, (1) DCT is capable of selective secretion of, HCO3–, , RPs PUBLIC sCHOOL ReWARI, , Page - 10, , (2) Injecting Rh antigen into mother's blood, immediately after delivery of the first child
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TesT – 2 (2021-22), , FOR CLAss XII ALPHA MeDICAL, , (2) Reabsorption in Henle's loop is maximum, , (3) Paramecium discharges concentrated salt, solution by contractile vacuoles, , (3) PCT also helps to maintain the pH and ionic, balance of body fluid by absorption of HCO3–, (4) DCT allow passage of small amount of urea, into medullary interstitium to keep up the, osmolarity, 143., , (4) The body fluid of freshwater animals are, generally hypotonic to surrounding water, 148., , (1) Counter-current flow of blood in vasa-recta, helps to retain the absorbed sodium in the renal, medulla, , Match the Column A with Column B, Column-A, (A) Renal calculi, (B) Alkaptonuria, , Column-B, (i) Inflammation of, , (2) Glomerular filtrate is protein free plasma, , urinary bladder, , (3) Vasa recta carry glomerular filtrate from distal, convoluted tubule to the collecting duct, , (ii) Inflammation of pelvis, of kidney, , (C) Cystitis, , (iii) Homogentisic acid, , (D) Pyelonephritis, , (iv) Calcium oxalate, , (4) Glomerular filtrate in Bowman's capsule is, isotonic to the plasma., 149., , (1) A-iv, B-iii, C-i, D-ii, , (2) A-iv, B-iii, C-v, D-i, , (3) A-iii, B-ii, C-v, D-iv, , (4) A-v, B-iv, C-ii, D-iii, , (A) Glycosuria, , (2) 0.10, , (3) 0.30, , (4) 0.40, , Column-II, (i) Accumulation of uric, acid in joints, , (B) Renal calculi, , (ii) Inflammation in, glomeruli, (C) Glomerular nephritis (iii) Mass of crystalized, , If GFR of a person is 0.14 L/min and RPF is 700, ml/min. Calculate the filtration fraction?, (1) 0.20, , Match column I and II, Column-I, , (v) Inflammation of, glomeruli, , 144., , Mark the incorrect statement, , salts within the kidney, (D) Gout, in, , (iv) Presence of glucose, urine, , Which of the following is incorrect?, , (1) A-i, B-iii, C-ii, D-iv, , (2) A-iii, B-ii, C-iv, D-i, , (1) The glomerular filtrate in descending limb of, loop of Henle is hypotonic, , (3) A-iv, B-iii, C-ii, D-i, , (4) A-iv, B-ii, C-iii, D-i, , (2) The diameter of arterioles of nephron helps to, maintain glomerular hydrostatic pressure, , 150., , (1) Sterols, (3) Waxes, , (3) Facultative reabsorption takes plane in DCT, (4) Ascending limb is impermeable to water, 146., , Which one of the following statements is correct, with respect to kidney function regulation?, , Which of the following substances is not, eliminated by sebaceous glands?, , 151., , (2) Hydrocarbons, (4) Lactic acid, , Match the following and choose the correct, option, Column I, , Column II, , (1) During summer, when body loses lot of water, by evaporation, the release of ADH is, suppressed, , (Mode or product, , (2) An increase in glomeruler blood flow, stimulates formation of angiotensin II, , a. Trimethylamine oxide (i) Marine, elasmobranchs, , (3) When someone drinks lot of water, ADH, release is suppressed, , b. Ureotelism, , (ii) Amoeba, , c. Ammonotelism, , (iii) Marine teleosts, , (4) Exposure to the cold temperature stimulates, ADH release, , d. Uricotelism, , (iv) Amphibian tadpoles, , (Organism), , of excretion), , (v) Insects, (1) a(iv), b(i), c(iii), d(v) (2) a(iii), b(i), c(ii), d(v), , 147., , Which one of the following statement is correct, with respect to water balance inside the body of, living organisms?, (1) When water is not available, camel does not, produce urine but stores urea in tissues, (2) Salmon fish excretes lot of stored salt solution, by contractile vacuole, , (3) a(iii), b(ii), c(i), d(v) (4) a(i), b(iii), c(ii), d(v), 152., , Reabsorption and secretion of major substances, at different parts of the nephron are given below., Identify the correct labelling for A, B, C and D, respectively, , RPs PUBLIC sCHOOL ReWARI, , Page - 11, , 145.
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TesT – 2 (2021-22), , FOR CLAss XII ALPHA MeDICAL, 156., , Match the columns I and II and choose the, correct option, Column - I, A. Proximal convoluted, , Column II, i. Permeable to H2O,, , but, tubule, to, , B, Nutrients, , C, Urea, , D, NaCI, , (2) NaCI, , Urea, , K+, , HCO3–, , (3) H2O, , NaCI, , Urea, , HCO3–, , (4) H2O, , Urea, , NaCI, , HCO3–, , True and false:, (i) Glomerulus is a tuft of capillaries formed by, the afferent arteriole, (ii) Descending limb of loop of Henle is, impermeable to water, , 157., , (iii) Ascending limb of loop of Henle is, impermeable to water, , 154., , tubule, C. Descending limb of, Henle's loop, , iii. Reabsorption of 7080% of filtrate, , D. Ascending limb of, loop of Henle, , iv. Facultative water, reabsorption, , A, , B, , C, , D, , (1), , iv, , iii, , ii, , i, , (2), , iii, , iv, , ii, , i, , (3), , iii, , iv, , I, , ii, , (4), , iv, , iii, , i, , ii, , Choose the incorrect statement, (2) Length of actin and myosin is not affected, during contraction, , (ii), , (iii), , (iv), , (1) T, , T, , F, , F, , (2) T, , F, , T, , T, , (3) F, , T, , F, , T, , (4) T, , F, , T, , F, , (3) Length of A-band decreases during, contraction of muscle, (4) In a myofibril each thick filament is, surrounded by six thin filaments, 158., , The renal blood flow in a normal adult human is, __________ min, which is roughly_________ of, the cardiac output, and of this roughly_________, of filtrate is formed per minute by both kidneys., , Read the following statements about the, mechanism of muscle contraction., (A) Acetylcholine is released when the neural, signal reaches the motor end plate, (B) Muscle contraction is initiated by a signal sent, by CNS via sensory neuron, , (1) 1100 – 1200 mL; 1/3 ; 180 L, , (C) During muscle contraction isotropic band get, elongated, , (2) 1100 – 1200 mL; 1/5 ; 125 mL, (3) 660 mL; 1/5 ; 125 mL, , 155., , solutes, ii. Impermeable to H2O, , (1) A-band has both actin and myosin filaments, , (iv) Approx 70-80% of glomerular filtrate is, normally absorbed in PCT, (i), , B. Distal convoluted, , (4) 180 L; 1/3; 125 mL, , (D) Repeated activation of the muscle can lead to, lactic acid accumulation. Choose the option, stating correct statements, , Read the following statements (A - D), , (1) 'A' and 'D', , (2) 'A' and 'C', , A - Micturition is carried out by contraction of, detrusor muscles and simultaneous relaxation of, urethral sphincters, , (3) 'B' and 'C', , (4) 'A' and 'B', , B - ADH helps In water elimination, making the, urine extremely dilute, , 159., , Identify the parts labelled 'A', 'B', 'C' from the, given diagram, , C - Honle's loop plays an important role in, concentrating the urine, D - Glucose is actively reabsorbed in the, proximal convoluted tubule, How many of the above statement are incorrect ?, (1) 0, , (2) 1, , (3) 2, , (4) 3, , A, (1) Actin, , RPs PUBLIC sCHOOL ReWARI, , B, Actin, , C, Troponin, , Page - 12, , 153., , A, (1) HCO3–, , almost impermeable
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TesT – 2 (2021-22), , FOR CLAss XII ALPHA MeDICAL, Tropomyosin, , Actin, , (3) Tropomyosin, , Troponin, , Actin, , (4) Myosin, Tropomyosin, , Troponin, , (4) Gradual increase in the degree of muscle, contraction after receiving repeated stimulus is, called treppe., 164., , 160., , Identify the structure labelled as P,Q,R and S in, the given diagram., , 165., P, , Q, , R, , Radius, , Ulna, , (2) Clavicle, Humerus, , Ulna, , Radius, , (3), , Clavicle, , Scapula, , Radius, , Ulna, , (4), , Radius, , Scapula, , Ulna, , Clavicle, , (1), , 161., , Scapula, , V. Calmodulin protein appears in skeletal, muscles, , Select the correct statement regarding the, specific disorder of musculoskeletal system, , VI. Number of T-tubules per sarcomere is two in, skeletal muscle, How many of the above statements are true?, , 166., , (1) the central gap between myosin filaments in, the A-band, (2) central gap between actin filaments extending, through myosin filaments in the A-band, , (3) 5, , (4) 3, , Match column A with column B & select the, correct option:, Column B, , a. Sarcomere, , I. Ectodermal, , b Rigor mortis, , II. Cardiac muscles, , c. Iris muscles, of, , III. Temporary stiffness, , d. Intercalated discs, , IV. Contractile unit of, skeletal muscle fibres, , (1) a - I, b - II, c - III, d - IV, , (4) the absence of myofibrils in the central portion, of A-band, , (2) a - IV, b - Ill, c - I, d - II, (3) a - III, b - IV, c - I, d - II, (4) a - IV, b - II, c - Ill, d - I, , Find the incorrect with respect to muscle, , (3) Refractory period is the gap in which, membrane recovers its polarisation and responds, to a second stimulus, , (2) 4, , muscles in individual, , (3) extension of myosin filaments in the central, portion of the A-band, , (2) In isotonic contraction the muscle shortens., , (1) 6, , Column A, , The H-zone in the skeletal muscle fibre is due to, , (1) In isometric contraction the muscle does not, shorten., , Read the following statements(I-VI):, , IV. During contraction of muscles ATPs are, utilised, , (2) Osteoporosis — Decrease in bone mass and, higher chances of fractures with advancing age, , 163., , (4) D - Parietal bone, , III. Acetylcholine receptor lies on sarcomere, , (1) Muscular dystrophy — Age related shortening, of muscles, , 162., , (2) B - Vomer bone, , (3) C - Hyoid bone, , II. Ca++ is released from SR that removes, masking proteins from active sites on myosin for, actin, , Clavicle, , (4) Gout — Inflammation of joints due to extra, deposition of calcium, , (1) A - Temporal bone, , I. During muscle contraction 'H' zone disappears, , S, , (3) Mysthenia gravis — Genetic disorder which, inhibits sliding of myosin filaments, , From the diagram, choose the correctly labelled, bone., , 167., , Mark the in correct statement(s) for myosin, (thick) filament, (1) Each myosin filament is a polymerised protein, (2) Its globular head has an active ATPase, enzyme, (3) It has binding sites for ATP as well as actin, , RPs PUBLIC sCHOOL ReWARI, , Page - 13, , (2) Troponin
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TesT – 2 (2021-22), , FOR CLAss XII ALPHA MeDICAL, , (4) The head is made up of LMM form cross, bridges with actin., 168., , Choose the incorrect statement, (1) Last 2 pairs of ribs have no ventral, attachment, (2) Ca++ ions are transported back to, sarcoplasmic reticulum passively when muscle, contraction gets over, (3) Humans have dicondylic skull and bicephalic, ribs, (4) Acromian process is associated with scapula, of pectoral girdle, , 169., , Arrange the following steps in correct sequence, fa skeletal muscle contraction, A. [Ca+2] gradually increases in sarcoplasm., B. Calcium binds to troponin, C. Troponin-tropomyosin move away from myosil, binding sites on actin filaments., D. Neural signal at neuromuscular junction, releases Acetylcholine., E. Action potential along sarcolemma., F. Action-myosin cross-bridges formed, (2) D E A B C F, , (3) D B E C A F, , (4) D B A C E F, , Match the columns and choose the correct option, Column - I, , Column - II, , A. Hinge joint, , i. Shoulder joint, , B. Gliding joint, , ii. Between radius and, carpal, , C. Ball and socket joint iii. Interphalangeal joint, D. Condyloid joint, , iv. Between carpals and, metacarpal of human, thumb, , E. Saddle joint, , v. Zygapophyses of, successive vertebrae, , (1) A - ii, B - iii, C - v, D - i, E - iv, (2) A - iii, B - v, C - i, D - ii, E - iv, (3) A - i, B - ii, C - iv, D - iii, E - v, (4) A - v, B - iv, C - ii, D - i, E – iii, , Page - 14, , 170., , 1) D E B A C F, , RPs PUBLIC sCHOOL ReWARI
