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AIIMS 2000 Exam Paper

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Tags : AIIMS, AIIMS 2012 Paper, AIIMS 2012 Question Paper, AIIMS 2012 Solution, AIIMS 2012 Paper with solutions, AIIMS 2012 Paper Solved, AIIMS 2012 Paper Online, AIIMS 2012 Important Questions, AIIMS 2012 Extrance Paper, Medical 2012 Exam Paper, AIIMS 2012 Extrance Paper Solved, AIIMS 2012 Previous Year Paper, AIIMS 2012 Paper Solved 1 Max. Time : 32 hrs. Max. Marks : 200 (PART 1. PHYSICS) 1 . The physical quantity whic h has the dimensional formula M 1T – 3 Is (1) Compressibility (2 ) D ensity … (3) Solar constant (4 ) Surface tension 2. A ball Is dropped downwards. After 1 second another ball Is dropped downwards &om the same point. What Is the distance between them after 3 seconds (1) 20m (2 ) 9.8 m (3 ) 25 m (4) 50 m 3 . If a particle of mass m Is moving In a ;. :horizontal drcle of radius r with a centripetal force (- 1 / r2), the total energy Is ( 1) _i (2 ) 2 r r (3) – .!. (4 ) – _!_ r 2r 4. A cubical block of side a Is moving with velocity v on a horizontal smooth plane as shown. It hits a ridge at point 0 . The angular speed of the block after It hits 0 Is + &+ ~ · \\ ””” ( 1) 3v/2a (3 ) 3v/ 4a (2 ) ..J3 v/ ..fl.a (4 ) Zero 5. A second’s pendulum Is mounted In a rocket. Its period of oscillation decreases when the rocket (1) Moves up with uniform acceleration (2) Moves up with a uniform velocity (3) Comes down with uniform acceleration (4) Moves round the earth in a geostationary orbit. 6 . Consider a car moving along a straight horizontal road with a speed of 72 km/h. If the coefficient of static friction between the tyres and the road Is 0.5, the shortest distance in which the car can be stopped Is [g = 10 ms – 2 ) (1) 20m (2 ) 40m (3) 30m (4 ) 72 m 7 . A force acts on a 3 .0 gm particle In such a way that the position of the particle as a . function of time is given by x = 3t – 4r + t 3, where x Is In metres and t is in seconds. Th~ work done during the flrst 4 seconds is (1 ) 530 mJ (2 ) 490 mJ (3 ) 450 mJ (4) 2 .28J 8. A body of mass 2 kg collides with a wall with speed 100 m/s and rebounds with same s peed. If the t i me of contact was 1/ 50 s econd, the force exerted on the wallis (1) 104 N (2) 4N (3) 2 X 1 if N J. (4 ) 8 N 9. If momentum Is Increased by 20,., then K.E. Increases by (1) 55% (2) 77% (3) 66% (4) 44% 10. The decrease In the potential energy of a ball of mass 20 kg which falls from a height of 50 em Is (1) 98 J (2) 968 J (3) 1980 J (4 ) None of these . 11. In a rectangle ABCD (BC = 2AB) . The moment of Inertia along which axis will be minimum www.examrace.com E A r——‘L—–, 8 (1) EG H ~ F o’—~—~ c G (2) HF (3) BD (4) BC 12. In a carbon monoxide molecule, the carbon and the oxygen atoms are separated by a distance 1.12 x 10 – 10 m. The distance of the centre of mus from the carbon atom Is (1)0.64 x 10 – 10m (3) 0.51 x 10 – 10 m (2) 0.56 x 10 – 6 m (4) 0.48 x 10 – 10 m 13. For a satellite escape velocity Is 11 km/s. If the satellite is launched at an angle of 60° with the vertical, then escape velocity will be 11 (1) 33 km./s · (2) ..f3 km/ s n..J3 km/ s (4)11 km/ s 14. If the radius of the earth shrinks by 1 . 5~ (mass remaining same) , then the value of acceleration due to gravity changes by (1) 1% (2) 3% (3) 4% (4) 2% 15. In which case there Is maximum tension In the wire, If same force Is applied on each wire (1) L = 400 em, d =· 0.01 mm (2) L = 300 em, d = 0.03 mm (3) L = 200 em, d = 0.02 mm (4) L = 500 em, d = 0.05 mm 16. If the surface tension of water Is 0.06 Nm – 1, then the capillary rise in a tube of diameter 1 mm is (0 = o’) (1) 3.86 em (2) 3.12 em (3) 2.44 em (4) 1.22 em 17. 1 mole of gas occupies a volume of 100 ml at 50 mm pressure. What Is the volume occupied by two moles of gas at 100 mm pre ssure and at same temperature (1) 500 ml (3) 100 ml (2) 200 ml (4) 50 ml 18. What is the velocity of wave In monatomic gas having pressure 1 kilo pascal and density 2.6 kg/ m3 . (1) 8.9 x 1 Q3 m/s (2) 3.6 m/ s (3)Zero (4 )Noneofthese. 19. A gas mixture consists of 2 moles of oxygen and 4 moles of argon at temperature T. Neglecting all vibrational modes , the total internal energy of the system is (1)11 RT (3) 15RT (2 )9RT (4)4RT 20. A diatomic gas initially at l8°C is compressed adiabtically to one – eighth of its original volume. The temperature after compression will be · (1) 144°C (2)891°C (3)887°C (4)18°C 21. The radiant energy &om the sun incident no~ally at the s urface of earth is 20 k cal/ m2 min. What would have been th4! radiant energy incident normally on the earth, if the sun had a temperature twice of the present one. (1) 80 kcal/ m2 min (2) 320 kcal/ m2 min (3) 40 kcal/ m2 min (4) 160 kcal/ m2 min 22. The ratio . of energy of emitted radiation of black body at 27°C and 927°C is (1) 1 : 256 (2) 1 : 64 (3) 1 : 16 (4) 1 : 4 23. Two waves of lengths 50 em and 51 em produced 12 beats per second. The velocity of sound is (1) 360 rn/s (2) 340 rn/s (3) 331 m /s (4) 306 rn/s 24. A whistle giving out 450 Hz approaches a stationary observer at a www.examrace.com . Z2. A monoenergetic electron beam with electron speed of 5 .28 x 106 ms – 1 is subjected to a magnetic field of 2 x to- 4 T normal to the back velocity. What is the radius of the circular path traced by the beam ? Given e /m for elec- ‘ 11 . – 1 tron = 1 .76 x 10 C kg . (1) 20 em (2) 15 em (3 ) 10 em (4 ) 5 em 23. The enagy of a photon corresponding to the visible light of maximum wavelengt. h is approximately equal to ( 1) 2 .0 eV (2) 2 .5 eV (3) 1.0 eV (4) 1.5 eV 24. A light signal (photon) cannot escape from the surface of a (1) neutron star (2) black hole (3) red giant (4 ) white dwarf 25. On Increasing the reverse bias to a large value In a pn junction dio de, the current ( 1) remains fixed (2 ) suddenly increased (3) decreases slowly (4 ) Increased slowly 26. In Boolena algebra I + I equals ( 1) 2 (2) 1 (3) 0 (4) both 0 and 1 27. Which of the following crystals have a hexagonal structure ? ( 1) zinc (2) calcite (3) quartz . (4) both (1 )& (3 ) 28. When a P-partlcle Is emitted from a nucleus, the neutron-proton ratio ( 1) is increased (2) is decreased (3) remains the same (4) first decreases then increases 29. If the end A of a wire is Irradiated with alpha rays and the end 8 Is Irradiated with beta rays, then ( 1) a current will flow from B to A (2) a current will flow from A to B (3) there will be no current in the wire (4) a current will flow from each end to the mi d point of the wire 30. If A, Z and N denote the mass number , the atomic number and the neutron number for a given nucleus, then which of the following stateme.nt Is Incorrect? ( 1) isobar have the same A but different Z andN (2)isotopes have the same Z but different N and A (3 ) isotones have the same N but different A and Z (4 ) N = Z+A 31. Moving with the same velocity, which of the following has the longest de Broglie wavelength ? ( 1) neutron (2 ) proton (3 ) p · particle (3) a -particle 32. A concave lens of focal length 20 em placed In contact with a plane mirror acts as a (1) concave mirror of foc.allength 10 em (2) concave mirror of focal length 60 em (3) concave m irror of focal length 40 em (4) convex mirror of focal length 10 em 33. If a graph Is plotted between 1/v and 1/u, which one of the graphs shown In figure Is approximately correct ? (l)t!~(2)lzl~ 1/u ~ 1/u ~ (3) tl / (4) t~ 1/v L___ l tv ~ 1/u ~ 1/u -+ 34. A particle of mass m and q Is released from rest In a uniform electric field E. The kinetic energy attained by the particle, after moving a distance x Is (1) q2 Ex (2 ) q Ex (3) q E2x (4 ) q u2 35. A proton and an alpha particle enter a uniform magnetic field with the same www.examrace.com (4) A magnetic field is applied nonnally 38. The wavelength of the first line of Balmer series is 6563 A. The Rydberg constant for hy~ogen is about (1) 1.09 x 10Sperm (2) 1.09 x 1 fll2) are going around the earth in orbits of raddi s q and f2 ( q > f2) . (1) (2) (3) 51. Assertion (A) : If a convex lens of glass is immersed in water its power decreases. (1) (2) (3) 52. Assertion (A) : When light passes from one medium to another of different density the only quantity which is unchanged is its wavelength. (1) (2) (3) 53. A ssertion (A) : The relative velocity of two photons travelling in opposite directions is C. (1) (2) (3) 54. Assertion (A) : A thin aluminium disc spinning freely about a central pivot is quickly brought to rest when placed between the poles of a strong U-shaped magnet. (1) (2) (3) 55. Assertion (A) : If the law of gravitation becomes inverse cube law even then a line joining the sun and the planet sweeps equal areas in equal time· intervals. (1) (2) (3) 56. Assertion (A) : A balloon stops rising after attaining a certain maximum height. (1) (2) (3) 57. Assertion (A) : A table cloth ~n be pulled from a table without dislodging the dishes. (1) (2) (3) 58. Assertion (A) : Alpha particles produce more intense ionisation than beta particles. (1) (2) (3) Reason (R) : The heat flows spontaneously from a system at a higher temperature to a system at lower temperature. (4) Reason (R) : The u-value of a single brick wall is L7Wm-~1 (4) Rea.on (R) : They will have same velocity. (4) Reason (R) : In water it behaves as a concave lens. (4) Reason (R) : The wavelength of light is not related to the refractive index of the medium. (4) Reason (R) : The rest mass of a photon is zero. (4) Reason (R) : A current induced in a disc rotating in a magnetic field produces a force which tends to oppose the disc’s motion. (4) Reason (R) : A planet moves. in an elliptical path. (4) Reason (R) : Upthrust due to air decreases with height till it just balances the weight of ~ balloon. (4) Reason (R) : To every action there is an equal but opposite reaction. Reason (R) charged. (4) Alpha particles are positively (4) www.examrace.com 59.The velocity of sound in air increases due to the presence of moisture . . (1) (2). . (3) 60 . . AssertiOn (A) .: The positive ray particles are more ma5!rive than electrt>ns. . (1) (2) (3) Reason : (R) : The presence of moisture in air lowers the density of air. · (4) Reason (R) : Positive rays are ·deflected by a magnetic field to a greater extent than cathode rays . . (4) ANSW’ER.s W’rrH HINTS cl EXPLANATIONS 1. Ans. (3) So~ constzmt is energy received per When the rocket accelerates upwards g inunit area per second creases to (g + a) · I.e. ML?–2 6 •.A . ns. (2) Friction = JlMg ~-~·· -=M1T-a L 2-r . H.ence retardation = Jlg = 0.5 x 10 = 5 rns- 2 2. Ans. (3) 1 . 1 Sia -~ =2 X 10 X (9)- 2 X 10 x14 =25m 111 Ans. ( 4 )m¢- · 1 . 2 1 “‘· . . – r, = r2- 1.e., mv-. =.re2 . . J e2 .. K.E: = – 2 and P.E.= F dtr=– r , r . . e2 e2,. j. · :.Total energy = K.E. + P.E.= -2 –= – – · r r 2 r I. Ans. (3) Angular · momentum with respect 0 before colliding with 0 =.Mv~ On collision, the block will rotate about the side passJng through 0 . . By law of conservation of angular momentum +&+ ·~M v 0 ,,~””” => Where I is the moment of inertia of · the block about the block about. the axis perpendicular to the plane passing through 0. 5. Ans. (1; T = 21t-{!. .9 . ~ Using¢- – u2 = 2ax Taking v ~ 0, u = 20ms -:- 1, wegetx = 40m l . 7. Ans. (4) W = :2m(~-~) v = dx = 3…: St + 3t2 dt . vo = 3 m/s and v4 = 19 mls 1 . . W = 2 X 0.03 X (19Z – 32) = 5.28 J s. Ans. (3) . ap = F6t · Here · llp = 2 x (2 x 1 OQ = 400 ms – 1 4oo 4 F = 1/50 = 2 X 10 N :L 9. Ans. (4) K =2 m ( 120 ) 2 100·P . 2 K, ._ ·-144L -144. K – 2m – · 2m- · . 1 .. aK=K -K=0.44K=44%K ·10. Ans. (1) aUp = mgh = 20 X 9.8 X 0.5 = 98 J 11. Ans. (1) AbOut EG, the maximum distano from the axis is the least. · 12 . Ans. (1 ) Rc ;, 12 x 0+ 16 x 112x 10- 10 M · 12+ 16 · = 16 -10 28 X 1.12 X 10 . m www.examrace.com 13 . . Ans. (4) Escape velocity is same for~ angles of projecti_on . 14. Ans. (2) g = G~; . · R 6g 6R . -= -2R =- 2 X 1.5=-3% . g . · F L 15. Ans . (1) y =A 6L . &. _ _!_ !:. _ F !:. _ 4F ( L) – A y – 1t (d2 / 4) y – 1tY d2 Here L! d2 ·is maximum for wire In option (1) · 16. AN. (3) Use ascent formula fo; capillary rise .. 17. Ans. (3) For 1 mole of gas, 50 X 100 = 1 X R X T For 2 moles of gas, • 50 X 100 RT v X 100 = 2 X R X T :. v X 100 = 2RT :::> V = 100 ml · _ r.rn “‘J’3 x 103 18. Ans. (4) C = ‘V~ =:’. 2.6 = ~ m~s 19. Ans . (1) Oxygen is diatomic gas, hence its energy of two moles . 5 ~2 x2RT=5RT Argon is a monatomic ~· hence its .internal energy of 4 moles 3 =4 x2 RT =6RT Total Internal energy = (6 + 5) RT = 11RT -. r-1 TV r – 1 H 14 20. Ans. (2) T1V1 = 2 2 ere r = · · 21 : ·Ans . (2) According to Stefan’slaiA:’ E oc: -r4 E1 (T1) 4 -E2 = T2 ~~ =(irf = 1~ . :::> E2 = 320 kcal/ m2 min 22. Ans. (1) E oc -r4 23. Ans. (4) v . v v v nl = Al = 0 .50 . and n2 = A2 = 0 .51 . [ 1 1 ] 6n = nl – n2 = v 0 .50 – 0 .51 = 12 – 12 X 0 .51 X 0 .50 – 306 I .. v- 0 .01 – m s 24. Ans . (1) The apparent fMquency heard by the observer is given by n’=-v-n v- vs Since ~ source is moving with velocity v, towards the stationary observer) = 330 x 450 = 3 2 3 9°7 x 450 = 500 Hz 330-33 25. Ans. (1 ) The · wave equation is · y=Asin(rot – kx+~) ~6.~. (3) ~ = 0 .5 x 1 Olt : c os(l’Orct – 5x) = 57i cos(101tt- Sx) . .. (~)max =·51t m / sec 27. Ans. (3) d – DA. – 1 X 5 )( 10 – 7 = 10 – 4 = 0 1 -13 .- 5×10- 3 · m · mm 28. Ans. (1) Since P is ahead- of Q by CXf’ and path difference between P and Q is A. / 4. Therefore at A. phase differenCe is zero, so in. tensity is 41. At C it is zero and at B, the· phese difference is 90° ., so intensity is 21 29. Ans. (3) Energy is conserved in the interfer· e nce of light. 30. Ans. (4) t = (1~2 – 1) (~1 -~2} . = (1.6 – 1) (±~- ·-~o) 0.6 1 = 60 = 100cm f = 100cm www.examrace.com I = m (ir + m ( i ) 2 = m; 2 Hence the correct choices is (2) . 6. Ans . ( 1) The centripetal force is provided by the gravitational attraction of the earth . Hence the correct choice is ( 1 ) . 7. Ans . (2) When stones are unloaded into the water in the tank, the volume of water displaced is equal to the volume of the stones. This is less than the volume of water having weight equal to the weight of stones because j the density of stones is greater than that of water. Hence the water level falls , which is choice (2) 8. Ans . ( 1) Mass of water in first tube is m = n~hp Now, surface tension hpgr hpgr’ cr – — – – – 2 – 2 where h’ is the height to which water rises in the second tube and r’ its radius. Since r’ = 2r, h’ = h / 2 Therefore, the mass of~ater in the second capillary tube is m’ = nr’2 h’p = 1t (2r)2 ~ p = 2n~ h p = 2m = 2 x 5 = lOg Hence the correct choice is ( 1) Fl…l 9. Ans. (2) Here 11 = m1v and Therefore, Given Thus , rl L2 = 2L 1 and r2 = 2 /1 1 1 1 12 = 2 X (2)2 .= 8 10. Ans. (2) The latent heat of vaporization of water is very nearly 540 calories per gram. Therefore heat released in the condensation of x gram of steam = 540 x calories . The latent heat of fusion of ice is very nearly 80 calories. Therefore, heat required to convert y gram of ice at 0°C to water at Thus or l00°C = 80+ y + 100 y = 180y calories 180 y = 540x l =3 X Hence the correct choice is (2 ) 11. Ans. (3) PVY = const ant 12. Ans . (2 ) If a force F is applied to a spring of force constant k and the spring extends by an amount x, then F = kx The extension x produced in a spring is proportional to its length . Thus, if the spring is cut into three equal pieces, the same force F will produce an extension x/3 in a piece. If k’ is the is the force constant of the piece, we have Therefore or F = k’ x/ 3 k’ -=k 3 k’ =3k Thus, the force e constant of ell<:h piece Is 3k. When springs are connected . in parallel, the force constant of the combination is equal to the sum of the individual force constants of the springs so connected. Therefore, the force constant of the combination = 3k + 3k + 3k = 9k. Hence correct choice is (2) . 13. Ans . (4) The speed of sound wave in the rod is . ,..,-;- 4 /2 X 1 ()ll - } v = v •/p = 'I 8000 = 5000 ms Time taken is = 115000= 2 x 10 - -4 s. Hence the correct answer is ( 4) 14. Ans. (1) Electric fiel d E = - ~~ = - ! (5 + 4i) = -Bx Force on charge ( - q ) = - q E = + 8q x At X = 0 .5 m , force = 8 X 2 X 1 o- 6 X 0 .5 = 8 x 10 - 6 N www.examrace.com 48. (1) Two systems are in thermal equilibrium 1 with a third system implies that all are at the 1 same, temperature. Hence, they will also be in thermal equilibrium . 49. (3) The u-value of a single brick wall is 3 .6 · W m-21\1 GM eM mJ 50. (3 ) -~- - = - rv=~ r V} - fr2 - v :..=. Since q > r2. vz > v1 V2 TJ 51. (3) When a convex len s of glass (j.i = 3/ 2) is immersed in water (j.i = 4 / 3) . its focal length increases. It becomes 4 times. This reduces its power to one-fourth its previous value. But the nature of the lens is not changed in this case. When a lens is immersed in medium whO¥ refractive index is greater than that of the material of the lens , its nature reverses. 52. (4) In the act of refraction it is only the frequency that remains unchanged. Wavelength is related to the refractive index. Thus, both the assertion and the reason are wrong. 53. (2) Very high velocities can not be added directly as in classical mechanics because this would lead to a violation of the postulates of relativity. Such velocities are added in accordance with Lorentz transformations. It can be proved that any velocity added to the velocity of light gives velocity of light . Relativistic mass of photon – The relativistic momentum of photon is moV p = —‘— But ~ h p= A h m oV m o=_b_~ VA u -lc2) For a photon v = c, then. mo = 0 54. (1) This effe ct is due to the production of ‘ eddy currents’ in the aluminium disc. They are produced due to the motion of d isc in magnetic field . According to Lenz’s la w they oppose this motion (which is the cause of the ir production ) and eventually bring the d isc to a stop. 55 . (2) Sweeping qual areas in equal time intervals is a consequence o f law o f conservation of angular mo mentum . So long as the gravitatio. nal force is radial. . no torque acts on the planet and the angular momentum is conserved. It is also true that a plane t moves in an elliptical orbit. But this is not the reason of the assertion. 56. ( 1) Balloon rises till the upthrust of air on it is greater than its weight. As the air becomes thinner with height. at height it is reached where upthrust becomes equal to the weight of the balloon . After this stage the balloon does not rise up further. 57. (2) The reason is law of inertia (Newton’s first law of motion ) and not law of action and reaction (Newton’s third law of motion) . 58. ( 1) The statements gi ve n in the assertion and the reason both are correct in themselves but high ionisin g power o f alpha particles is no t due to their positive charge . The greater ionisation power of alpha particles is due to their higher energy than beta particles. 59. (1) Velocity of sound in a ir is given by v = ~ d The density of water vapours is less that of dry air. Hence , the presence of moisture decreases density d o f air. This res ults in increase of veloc ity of sound. 60. (3 ) Electrons being much lighter than positive ray particles (ions) are deflected more in a magnetic field . www.examrace.com PAaT 2. CH£MISTR)( 1. 26 ml of C02 are pa .. ed over hot coke. The maximum volume of CO formed Is : (1) 32 ml (2 ) 52 ml (3) 15 ml (4 ) 10 ml 2 . Unsultablllty of nucleus ls du. t~ ~ (1) Low proton – electron ratio (2 ) High proto n – electron ra ti o (3) High proton – neutron ratio (4 ) High ne utron – proton ratio 3. Bohr’s atomic theory gave the idea of : (1) Nucleus (2 ) Shape o f sub – levels (3 ) Quantum numbers (4 ) Statio nary states. ‘ 4. Which has maximum radioactive activIty: ( 1) Uranium {2 } Plutonium (3) Radium (4 ) Thorium 5. Overlapping of 2 hybrid orbitals can lead to the formation of : {1 } 1t- bond (2 } a- bond (3) Ionic bond (4 ) None 6. NFs Is : (1) Having m ore dipole moment that NHa (2) Having low value of dipole moment than NH3 (3) El e ctrovalent compound (4 ) Non – pola r compound . 7. The compound having highest boiling point : ( 1) CH4 (2 ) CH30H (3 ) CH3Br (4 } CH3Cl 8. An element A (at. wt. = 75) and B(at. wt. = 25) combine to form a compound. The compound contains 75’rct A by weight. The formula of the compound will be (1) AB (2 ) AB3 (3 ) A3B (4) A2B 9. The number of mUll equivalents ln 100 ml of 0 .5 N HCI solution Is : (1) 200 (2 ) 100 (3 ) 50 (4) 25 10. Number of electrons ·Involved In theNduction of CrtO’ – Jon In acidic solution to Cr3 + Is : ( 1) 4 (2) 6 (3 ) 3 (4 ) 4 11 . Stronger the oxidising agent, greater ls the: ( 1) Oxida tio n potential (2 ) Reduction potentia l {3 } Ionic behavior ( 4 ) None 12. In a reaction 4 mole of electrons are transferred to one mole of HN03 when It acts as an oxidant. The poss ible reduction pl’oduct ls ~ ( 1) 1 mole NH3 (2 ) 1 mole of NOz (3 ) ( 1/2) mole N20 (4 ) (1/2) m ole N2 13. The volume at NTP occupied by 11 g of C02ls : {1} 11 .2 litre (2 } 2.8\itre (3 ) 5.6 litre . (4) 2 . 2 4 litre 14. Which Is not correct for catalpt. It : ( 1 ) Reduces activation e ne rgy of reaction (2 ) Specific i n nature (3 ) Enhances the rate of reaction in both directions (4 ) Changes enthalpy o f reaction 15. An albumin sol containing sodium chloride as an Impurity can best be freed of this Impurity by : ( 1) Electrop ho resis (2 ) Dialysis ( 3} Precipitation (4) Ftltration . 16. Which r eaction gives more products u a re•ult of Increase In pressure : (1)2HI t-~ H2 + l2 (2) 2502 + Oz ~ ~ 2SOJ (3) H 20 + CO +-~ H2 + C ~ {4 } H 2 + Br2 ~ ~ 2HBr 17. HCI does not behave u add In : (1) C#f 6 (2) NH3 (3 ) H zO (4 ) None 18. The mixed salt among the following Is www.examrace.com (1) CaCOClz (2) NaKS04 (3) Mg(OH)Cl (4 ) All 19. If s and S are respectively solubility and solubility product of a sparingly soluble binary electrolyte, the n : (ll s = s 112 (2l s = 11 2s (3) s = s (4) s = s2 20. An aqueous solution contains a substance which yields 4 x 10 – 3 mol litre – 1 ion of H 30 +. If Jog 2 is 0 .3010 the pH o f the solution is : {1} 2.398 (2) 1.5 (3) 3. 0 (4) 3.4 21. SOCI2 + CH3COOH ~ CfiaCOCI+ HCI+ sq The reaction is endothermic. A 10 degree centigrade temperature rise will cause the reaction ratio to : ( 1) Decrease (2 ) Become exactly half+ (3) Remain unchanged (4) Become nearly double 22. An example of a closed system is : (1) Hot liquid in closed beaker in equilibrium with its vapour (2) Hot liquid in an open beaker (3) Hot liquid in a sealed insulated beaker (4) None 23. If H2(g) + l2(g) ~ 2HI (g); Mi = 12.40 kcal. The heat information of HI fs : ( 1) 12.4 kcal (2) 6 .20 kcal (3)- 6 .20 kcal (4)- 12.4 kcal 24. If 50 ml of A283 reacts c ompletely with 200 ml of C2 in a closed vessel according to the equation , 2A28 3 (g) + SC2(g) ~ 3C3~(g) + CA4 (g). The composition of the mixture of gasd Is : ( 1) 10 ml Cz , 25 miC3~ . 100 ml ~ (2) 25 ml Cz, 75 ml C3 ~ . 2Sml C~ (3) 75 ml Cz, 75 ml C3B2 , 25 ml C~ (4) 100 ml Cz, 50 ml C3B2. SO ml CA4 25. If the atomic number of an element is 33, Jt wiiJ be pJaced in the periodic table in the : ( 1) 7th group (2 ) 5th group (3 ) 4th group (4 ) 1st group 26. The voJume of ‘ 10 Vol’ of H202 requited to liberate 500 ml 02 at NTP is : (l} 125 ml {2 ) 100 ml I (3) 25 ml (4) 50 ml I 27. The oxide of which metal Js most stable to heat : { l ) Ag {2 ) Hg (3 ) K (4 ) All of these 1 28. A hydride of nitrogen which is acidic in nature is : {1) N3H {2) NzH2 {3) NzH4 (4) NH3 29. Which melts in boiling water : ( 1) Bell metal (2} Monel metal (3) Wood’s metal (4) Gum metal 30. Nitric a cid may be kept In a bottle of : (1) Sn (2 ) AI (3 ) Pb (4 ) Ag 31 . When Zn reacts with very dilute nitric acid it produces : (l)Hz (3) NH~03 (2} N02 (4 ) NO 32. Which loses weight on exposure to the atmosphere : (1) Anhyd . AICI3 (2 ) NaOH (3 ) Cone. H2S04 (4 ) Saturated aqueous solution of c~ 33. The reaction of chlorine with CO In the presence of sunlight gives : (1) H 2 C~~ {2 ) HOC! (3) C02Ct2 (4) COCI2 34. The gas used for inflating the tyres of aeroplanes is : ( 1)’ Ar (2) He (3) Hz (4) Nz 35. d – Block elements are arranged in . . of periodic table : ( 1) Six series (2) Four series (3) Three series (4 ) Two series. 36. Which on mixing gives deep brown colour: www.examrace.com (1)NO+Oz (3) N203 + 0:? (2) N20 + 0z (4) None o,tN.OH l&\/ Oi3COOH 37.CH !E CH —+ X Y. y Is (1) CH30H (3) CH3CH20H 38. Which Is expected to react most readIly wtth bromine : (1) CH3- CH = CH2 (2) CH = CH (3) CH2 =CH2 39. The structural formula of the compound whlch yields ethylene upon reaction wtth zinc Is : (1) CHBr- CHBr (2) CHBr2- CHBr2 (3) CH2Br – CH2Br (4) None 40. Glycerol on treatment with potassium hydrogen sulphate yields (1) Acraldehyde (2) Acrylic acid (3) Propane (4) Ethanol § Dlrectl~ Q4J to 60 co,..,.,_ of two statement., one labelled the ‘A .. ertlon (A) ‘ and the other labeUed the ‘ReMOn (R)’. Examine these .statements carefully and c$edde 1/ ( 1) If both assertion and reason are true statements and the reason is a correct explanation of the assertion (2) If both assertion and reason are true statements but reason is not a correct explanation of the assertion (3) If the assertion is true but the reason is a false statement (4) If both assertion and reason are false statements. 41. Assertion (A) : Water is specially effective in Reason (R) : The force of ionic interactions descreening the electrostatic interactions between pends upon the dielectric constant (6) of the solthe dissolved ions. vent. (1) (2) (3) 42. Assertion (A) : The nearly tetrahedral arrangement of the orbitals about the oxygen atom allows each water molecule to· form hydrogen bonds with as many as four neighbouring water molecules. (1) (2) (3) 43. Assertion (A) : Methanoic acid reduces mercuric chloride to mercurous chloride on heating while ethanoic acid does not. (1) (2) {3) 44. Assertion (A) : Phenol undergoes Kolbe’s reaction whereas ethanol does not (1) (2) (3) 45. Assertion (A) : The pressure of a gas is inversely proportional to its volume at constant temperature and n . (1) (2) (3) 46. A.sertion (A) : The oxidation numbers are artificial, they are useful as a ‘book-keeping’ device of electrons in reactions. (4) Reason (R) : In ice each water molecule fonns four hydrogen bonds as each molecule is fixed in the space. (4) Reason (R) : Methanoic acid is a· stronger acid than ethanoic acid. (4} Reason (R) ; Phenoxide ion is more basic than ethoxide ion. (4) Reason (R) : The gas volume is directly proportional to n at constant temperature and pressure. (4) Reason (R) : The oxidation numbers do not usually represent real charges on atoms, they are simply conventions that indicate what the maximum charge could possibly be on an atom in a molecule . www.examrace.com (1) (2) (3 ) 4 7 . AaMrtlon (A) : As mole is the basic chemical unit, the concentration of the dissolved solute is usually specified in terms of number of moles of solute. (1) (2) (3) 48. Aaaertlon (A) : The atoms of different elements having same mass number but different atomic number are known as isobars. (1) (2) (3) 49. AaHrtlon (A) : Lead is a metal with a high density. It readily dissolves in moderately concentrated nitric acid giving colo urless fumes which tum red in contact with air. (1) (2) (3) 50. AaHrtlon (A) : p- nitroaniline is stronger base than p- toluidine. (1) . . (2) (3) 51. Aaaertlon (A) : When 20 ml of ethanol is mixed with 20 ml of water, the volume of resulting solution will be less than 40 mi. (1) (2) (3 ) 52. A .. ertton (A) : Stanous chloride (SnClz ) is a non-linear molecule. (1) (2) (3) 53. Assertion (A) : During the fermentation of grape juice, a reddish brown coloured crust is formed . (1) (2) (3) 54. Anertlon (A) : An orbital cannot have more than two electrons, moreover, if an orbital has two electrons they must have opposite spins . (1) (2) (3) 55. Assertion (A) : A spectral line will be seen for the transition 2px to 2py. ‘ (1) (2) (3) 56. Assertion (1) : Alkenes and cycloalkanes series of hydrocarbons have same general formula . (1) (2) (3) 57. Assertion (A) : The solubility of n- alcohols in water decreases with increase in molecular weight. (4 ) Reason (R) : The total number of molecules of reactants involved in a balanced chemical equation is known as molecularity of the reaction . (4) Reason (R) : The sum of protons and neutrons, in the isobars is always different. (4) Reason (R) : Nitric oxide (NO) is a colo urless oxide of nitrogen while NOz is a coloured oxide of nitrogen . (4 ) Reason (R) : The electron withdrawing N~ group in the p-nitroaniline makes it a stronger base. (4 ) Reaaon (R) : The hydrogen bond between water and alcohol molecules is weaker than hydrogen bond between the like molecules . (4) Reason (R) : In (SnCI2) molecule Sn atom is present in sp hybridised state. (4) Reaaon (R) : Impure potassium hydrogen tar· trate is of reddish brown colour and it is known as argo! (4) Reason (R) : No two electrons in an atom can have same set o f all the four quantum numbers. (4 ) Reaaon (R) : Energy is released in the form of wave of light when the electron drops from 2px to 2py orbital. (4) Reason (R) ; Either insertion of a double bond or formation of a ring reduce the number of hydrogen atoms of corresponding alkane by 2 . (4) Reason (R): The relative proportion o f the hy· d rocarbon part in alcohols increases with the increase in molecular weight which permits enhanced hydrogen bonding with water. www.examrace.com AIIMS An•lyzer (1) (2) (3) 58. ~Hrtlon (A) : The carboni£ acid is stronger acid than phenol. (1) (2) (3) 59. A•sertlon (A) : When a· concentrated solution · is diluted by adding more water, the number of moles of. solute in. the solution remains unchanged. (1) (2). (3) 60. AIHrtlon (A) : 14Si30, 15 p3l and 1()532 are a group of isotones. (1) (2) (3) •f3f (4) .· Rea•on (R) : The hybrid of bicarbonate ion has two equivalent conbibutlng strUctures, · · while hybrid of phenoxide ton does not contain such equival(mt contributing structures. (4) Reuon (R) ; Number of moles of a solute is equal to the product of molarity and volume of solution in litres. (4) Reason (R) : lsotones are atoms .of different elements having different mass numbers and atomic numbers but same number of neutrons in their nuclei .. (4) ANsWERs WITH HINTS 4 EXPLANATIONS 1. Ans. (2) C~ + C-+ 2CO 2. Ans. (4) n/p> l.Sleads to unstable nucleus. 3. Ans. (4) Stationary states. 4. Ans. (3) Ra is most radioactive ele.ment. 5. Ans. (2).Hybrid orbitals always from a-bond. 6. Ans. (2) lnspite of three-polar bond, the lone pair of. electr9n on N atom decreases the dipole moment of NF3 than NH3. 7. Ans. (2) Due to H- bonding. . . . 75 8. Ans. (1~ g atom of A= 75 = 1; . g atoms of B = 25(25; :. Ratio of g atoms of A & B = 1 : 1 9. Ans. (3) Meq. = 100 x 0.5 =50 10. Ans. (2) C~ + + 6e -+ 2Cr3 + 11. Ans. (2) More is F.&>. more is the tendency to get itself oxidised, more .iS reducing nature. 12. Ans. (3) 4e + N5 + -+ N1 + :. possible product is N20 13. Ans. (3) 44 g c~ occupies 22.4 litre at NTP. 14. Ans. (4) Catalyst does not make the reaction rno~ exothermic or endothermic .. · 15. Ans. (2) Separation . of soluble impurities from sol in followed by dialysis; . 16. Ans. (2) · An increase in P favours the reaction showing decrease in voiume. 17. Ans. ( 1) ~ is ~ot capable of accepti.ng proton. 18. Ans. (4) A mixed salt is one which· furnishes · two types of cations or anions: 19. Ans. (1) 5 = s2 :. s = …JS for electrolytes like · AgCl, AgBr or AB ~· 20. Ans. (1) rw1 =4 x w-3M :. pH= – log 4 X 10-3 = ~:3~, www.examrace.com 21. Ans. (4) Rate constant increases twice to thrice for each l0°C rise in temJ)imture and therefore the rate also changes accordingly. 22. Ans. (1) A closed system can exchange energy from its surroundings. 23. Ans . (2) Heat of formation = 12 2_ 40 =6.20kcal 24. Ans. (3) The mole ratio is 2 : 5 : : 3 : 1 Re;,ction Products 25. Ans . (2) The short hand notation for 33 is , fAr} 3dl0 4sz 4p3 26. Ans . (4 ) 10 v0l. Hz~ means that 1 ml H z~ gives 10 ml ~.;Thus 50 ml Hz~ wiU give 500ml~. 27. Ans. (3) Ag and Hg oxides decompose on heating. 28. Ans. (1) N3H is called hydrazoic acid . 29. Ans. (3) Wood metal has m .pt. 71oC 30. Ans. (2) Only AI among these does not react with HN03. 31 . Ans. (3) 4Zn + 1CHN03 (verydil) -.. 4Zn (N03)2 + NH~03 + 3 H20 32. Ans. (4) c~ gets evaporated slowly. 33. Ans . (4 ) CO+ Clz –. COClz 34. Ans . (2 ) He is lightest (after H2J. non inflammable gas. 35. Ans. (2) 3d, 4d and 5d series am complete ~d 6d series incomplete. 36. Ans. (1) 2NO + ~ -.. 2N~ (browr) 37. Ans. (4) ozonolysis CH•CH CHO – CHO reduction 38. Ans . (3) Alkenes are more reactive than alkynes towards addition maction also ethene is most reactive alkene. I 39. Ans . (3) Zn CHzBr – ClizBr – -.. CH2 = CH2 + ZnBr2 40. ~ – (1) KHS04 is dehydrating agent. 41 . ( 1) The strnngth of the force (F) of the ionic interaction depends, upon the magnitude of charges (Q ), the distance between them and the dielectric constant of solvent as F – QlQ2 – 2 t r Water has high value for £ and thus screens the interactions between ions more effectively. 42.(1) At any given instant in liquid water at room temperature , each · water molecule forms hydrogen bonds with an average 3.4 other water molecules. The H20 molecules are in continuous motion so hydrogen bonds are constantly and rapidly broken and formed. In ice HzO molecules are, however fixed in the space lattice. 43. (2} Me thanoic acid reduces mercuric chloride as : 1 – HCOOH + 2HgCj ~ COz + 2HCI+ H~Cl2 Ethanoic acid does not mact with HgCl2 Since alkyl groups am electron releasing their pmsence in the molecule will decrease the acidity. Thus methanoic acid (HCOOH ) is about 10 times stronger than ethanoic acid (CJ-bCOOH ) . 44. (3) Kolbe’s Reaction : ONa 120oc OH ~ + C02 ~ COON a ~ 0.7aan. Sod. Phenoxlde Sod alicylare Ethanol does no.t undergo this reaction. Phenol is a stronger acid than ethanol. Hence the conjugate base (Phenoxide) will be weaker base than ethoxide ion. 45. (2 ) 46. (1 ) 47. (2) The number of moles of a solute present in a litn? of solution is knqwn as molarity (M). The total number of molecules of reactants present in a balanced chemical equation is known as molecularity. For example www.examrace.com PCJ 5 -t PCJ3 + Cl2 (Unlmolecular) 2 HCI ~ H2 + l2 (Bimolecular) Therefore, molarity and molecularity are used in different sense. 48. (3) Isobars are the atoms of the different elements having same atomic weight or mass number. It means the sum of protons and neutrons will be same. Atomic number of isobars are different. Hence, (A) is correct and (R) is wrong. 49. (1) 3Pb + 8HN03 ~ 3PB2 + + 6N03 + 2NO + 4H20 2NO + ~ –. 2N02 Colourlae red 50. (4) The presence of electron releasing group like – CH3 at para position increases the basic strength . On the other hand the electron withdrawing – N02 group decreases the basic strength. Hence p- nitroaniline is weaker base than p – toluidine . 51. (3) Due to the presence of hydrogen bonding between H~ and <>.!HsOH the inter moJedllar attraction increases, therefore after mixing these two compound their volume of mixing decreases from expected volume. 52. (3) The SnCl2 molecule is ‘V’ shaped and the hybridizaton involved in it is sp2 53. (1) A reddish brown crust of potassium hydrogen tartrate, known as argo!, is deposited during the fermentation of grape juice . 54. (1) According to Pauli’s exclusion principle no two electrons in an atom can have same set of all the four quantum numbers. From this it foUows that an orbital cannot have more than two electrons. If an orbital has two electrons then they ,have opposite spins. 55. (4 ) Spectral line can be seen only when electron Jumps from higher energy level to lower energy level. But 2px and 2Py are the different configuration of same energy level. 56. ~ 1) The general formula of alkene is CnH2n and the general formula of cycloalkane is also CnH2 n· It is due to the formation of cyclic structure, carbon chain loses hydrogen atom from both end and become cycloalkane. This loss of two hydrogen atom gives the general formula CnHzn 57. (3) It is true that solubility of alcohols deetel~ Ses as the molecular weight of alcohol increases . it is due to the fact that bulky alkyl group pumps electron towards electronegative oxygen atom ( + I effect). This Increase In electron cloud over oxygen atom, decrease the tendency of formation of hydrogen bond, hence , solubility decreases. 58. (1) The phenoxide ion ~s-0-, does not have any contributing structure but HC03 ion has two contributing structure, that is why H2C03 is stronger acid than ~sOH 59. (1) 1t is true that number of solute never changes after dilution because number of moles of solute ., _ No. of moles of solute x volume in (L) – volume in (L) 60. (!)Different atoms when contain same number of neutrons are called isotones. 14Si30, 15 p3l and 1~32 are isotones, because all of these contains 16 neutrons. since, For Atomic mass = n + p n == atomic mass – p Si –. 30- 14.= 16 p-+ 31 – 15 = 16 s -+ 32 – 16 = 16 www.examrace.com Part 3. BIOLOGY l . The main difference between chlorophyll ‘a ‘ and ‘b’ Is ( 1) Chlorophyll ‘a ‘ has no Mg + ion in centre of molecule (2) Chlorophyll ‘a’ is linear chain compound and ·~· is brached chain • (3) In chlorophyll ‘a’ there is CH3 group whereas in ‘b’ it is – CHO group ( 4) All of the -ebove 2. Loops of hunpbrush chromo.ome are compoeed of ( 1) Protein and RNA (2) Double helix DNA only (3) Double helix DNA, protein and RNA (4) Single stranded DNA, protein and RNA 3 . . In F2 generation of monohybrid cro .. the cause of 1 : 2 : 1 phenotypic. ratio Is (1) Inhibition • (2) Eplstatics (3) Incomplete dominance (4) Quantitative inheritance 4. The evidence tha.t crossing over occurs at four stranded stage and not at two stranded stage of the chromosomes, comes &om (1) Studies of meiosis in maize · (2) Studies on linkage maps of chromosomes in Drosophila (3) 4 : 4 arrangement of ascospores in Neurospora (4) 2 : 2 : 2 : 2 arrangement of ascospores in Neurospora 5. Why mycoplasma Is pleuomorphlc ( 1) Due to the presence of sterol (2) Due to absence of cell wall (3) Due to presence of three layered cell membrane (4) None of these 6. Heterotroplc nutrition Is found In (1) Pistia (2) Va//isnaria (3) Drosera (4) Opuntia 7. Pteridophytes are also called (1) Ctyptogames (2) Phanerogames (3) Amphibian of plant kingdom (4) Vascular cryptogames 8. Which one of the following normally have cross pollination but are adapted for self pollination (1) Wheat (2) Sunflower (3) China rose (4) Mustard 9. Numb… of nuclei taking part In double ferttlbation Is (1) 5 (2) 4 (3) 3 (4) 2 10. Secondary was fs not formed In (1) Companion cells (2) Collenchyma (3) Parenchyma ( 4) All the above 11. Trachelds of anglospems are recognised by the presence of · ( 1) Scalaiforrn perforation plates (2) Scalaiforrn thickening (3) Bordered pits (4) None of the above 12. Whfch of the following is fertilizer (1) Urea (2) Ammonium chloride (3) Calcium citrate (4) Calcium carbonate 13. The conducting tissues of the planb are (1) Sclerenchyma (2) Phloem (3) Xylem (4) Xylem and phloem both 14. Pollen grains of some of the plants g«· minate on stigma soon but they bunt in water or dllute sugar solution (1) Plasmolysis (2) Imbibition (3) Endosmosis {4) Exosmosis 15. Which of the following Is responsible for rapid to .. of water &om plant ( 1) Water vapour saturation deficit (2) Water vapour satura.tion of air (3) More available soil water to the plant {4) None of the above 16. Who Invented the enhancement effect on photosynthesis · (1) Arnon (2) Emerson www.examrace.com (3) Calvin (4) Ruben 17. Who rec e ived the Nobel Prize for working out the early cal’bon pathway of photosynthes is (l)Watson (2) Khorana (3) Krebs (4) Calvin 18. The number of rnolecuJ.. of pyruvic acid formed from one molecule o f glucoae at the end of glycolyals Is (1) 4 (2) 3 (3) 1 (4) 2 19. End product of anaerobic raplratlon Is ( 1) Pyruvic acid (2) Glucose (3) Ethyl alcohol and C~ (4 ) None of the above 20. Acetyl CoA enzyme belongs to ( 1) Hydrolase (2) Desmolase (3) Isomerase (4) Synthetase 21. Indicator plant• which can be UHd to Indicate atmospheric pollution by S02 are: (1) Climbers like Cucurbita (2) Uchens like Usneo (3) Moss like Sphagnum (4} Grassland like Deschampsia 22. Deforestation may reduce the chanc es of. (1) erosion of surface soil (2) frequent landslides (3) rainfall (4) frequent cyclones 23. Whic h of the following ahow the least constancy of shape? (1) Leucocytes (2) VISceral muscle cells (3) Neurons (4 ) Eryt h rocytes 24. Shivering in c old Is a method for: (1) preventin g radiation of heat fro m the body (2) production of heat by bringing more blood to the body surface (3) production of heat by muscluar contractions (4) none of these 25. Low~ jaw of tadpole is formed by: (1) Coracoid (2) Meckel’s cartilage (3) Angulo-splenial (4) None of the above 26. Which of the following bone Is a favoured site for obtai ning haemopoletlc tissue? ( 1) Radius (2 ) Vertebral column (3) Cranium (4) Sternum 27. Certain B vitamin• act u : ( 1 ) Hormones (2) Digestive substance (3) Co-enzymes (4) Enzymes 28. When partial pressure o f COt rt … , the oxygen d issociation curve of haemoglobin at 3~C will: ( 1) remain unchanged (2) become irregular (3) s hift towards left (4 ) s h ift towards right 29. In a normal man, the amount of blood put out by heart per minute Is : ( 1) 3 1i tres (2) ! litre (3) Slitres (4) 4litres 30. Aquatic animals are most ly ammonotelfc because : ( 1) these get less light (2) water contains less n itrogen (3 ) excretion of ammonia requires large amount of water which is available to these animals (4 ) ammonia helps in checking inflow of water ioto body 31. Heart beat fa re gula te d by the worldng of: (1) Midbrain (3) Cerebrum (2) Diencephalon (4) Medulla oblongata 32. Scala vestfbulf and scala media contain respectively: ( 1) Perilymph only (2) Endolymph only (3) Perilymph a n d endolymph ( 4) Endolymph and perilymp h 33. Which endocrine gland stores Its H · cretlon In the extrac ellular e pace before discharging It Into the bl ood? (1) Testis (2) Pancreas (3) Adrenal (4 ) Thyroid 34. Test es of rabbit oc c u r : (1 ) in scrotal sacs (2) on side of kidney www.examrace.com (3) inside body (4) on either side of dorsal aorta 35. During fertilization, the enzyme which facllitatn penetration of the egg by the spermatozoan is: ( 1) acetylcholineasterase (2) alkaline phosphatase (3) acid phosphatase {4} hyaluronidase 36. During regeneration, the following takes place: (i) cell division (ii) dedifferentiation (iii) cell movement (iv) tissue differentiation The correct sequence is: (1) (ii), (i), (iii), (iv) (2) (i), (ii), (iii), (iv) (3) (i), (Iii), (ii), (iv) (4) (iii), (ii), (i), (iv) 37. Laws of inheritance were given by: (1) Mendel (2) Darwin (3) Khorana (4) Lamarck 38. Chromosomes concerned with sex determination are: ( 1) Oxysomes (3) Autosomes (2) B-chromosomes ( 4) Heterosomes 39. Semiconservatlve DNA replication was ftnt demonsbated by~ . (1) Watson and Crick (2) Khorana · (3) Meselson and Stahl (4) Taylor 40. Which chromosome set Is found In male grasshopper? (1) XX (2) YY (3) X (4) XY § Dlrectlo,.. Q4l to 60 co,..l.t. of two •tatemenu, one labelled the ‘A•ertfon (A) ‘ and the other labelled the ‘Rea.on (R)’. &amine thae •tatement. carefully and decide If (1) lf both assertion and reason are true statements and the reason is a correct explanation of the assertion (2) If both assertion and reason are true statements but reason is not a correct explanation of the assertion (3) If the assertion is tru·e but the reason is a false statement (4) If both assertion and reason are false statements. 41. Assertion (A) : The chewing and lapping Reason (R) : The galeae are much elongated mouth parts consist of a long tounge which is and coiled, each forming a half tube, which formed from the glossae of the labium. makes complete tube when both are locked to42. Assertion (A) : Left-handed DNA is known as B-ONA. . . 43. Assertjon (A) : Translocations involve shifting, not deleting or adding genetic material which can cause chromosomal defects when gametes are formed. 44. Assertion (A) : They form mutualistic, comniensalistic, or parasitic relationships. 45. Assertion (A) :The sustaining surface for the gliding in certain animals, is a fold or series of folds of the s102 and thus % saturation of haemoglobin with oxygen will be lesser there by shifting the oxy· gen dissociation cu·rve of haemoglobin to right 30. Animals consuming less water are urotellic 35. Sperm penetrates the egg by the help of enzymes of hydrolase class which breaks the outer shell of egg 36. Regeneration is the capacity of body to produce the lost part by proliferation of cells 38. Heterosomes are found on the males e .g .. Y chromosomes which are responsible for sex determination . 41. ·(3) In chewing lapping mouth parts a temporary food channel is formed by proboscis, galeae and labial palps filling together. 42. (4} Left-handed and right-handed DNAs are respectively known as Z-ONA and B-ONA. 43. Translocation of genetic material between non homologous chromosomes. Ttansl~tions may take a number of forms; the most common form involves a single break in each of two chromosomes and an exchange of broken pieces. 44. (3) Heterotrophs may be free-living or symbiotic, meaning that they form mutuallstic, commensalistic or parasitic relationships. www.examrace.com 45. (3) Patagium is concerned with flight or volant adaptations . The gliding flights are performed with the help of patagium by various liza rds e .g., flying dragon. 46 . (3) There is a gradual decrease in the energy content at successive trophic lev e l from producers to consumers. 47. (3 ) In mammals foetal components of two place nta d erive in itially from the trophoblast connected wi th embryonic blood stieam e ither through its contzw:t with the yolk sac. 48 . (3) The mosses, like the liverworts, exhibit a well-defined alternation of generations between gametophyte phase, whose cells contain a s in gle set o f chromosom es (n), and a.. sporophyte phase , whose cells contain a d ouble set of c hromosomes (2n ). 49. (2) Histones are basic proteins of major im portance in packaging of e ukaryotic DNA. DNA and h istones together comprise chromatin, fo rming the bulk of the eukaryotic chromosome. Histones are of five major types, H1, H2A and H2B are lysine rich ; H3 and H4 argi nine-rich, Ht units link neighbouring nucleosomes while the others are elements of nudeosome structure. Histo ne proteins are synthesized during the S -phase when DNA synthesis ocx:urs . 50. (4) In Se/agine/la, reduction division ocx:urs during formation of both m icrospores and megaspores. 51. (3 ) Conjunctiva is composed of stratified epithelium and in continuous with the epidermis, the lines the eyelids . 52. (3) According to cohesive-adhesive force theory of water molecules, water ascends in the p lant because of transpiration pull and column of water remains continuous because of cohesive force of water molecules. 53. ( 1) 54. {4} Monocot stem has collateral dosed vascular b undles. In monocot stem , cambium is absent such vascular bundles are called closed . 55. {2) 56. (4) Proteins and RNAs are synthesised in Gt phase during interphase. The p hotosystem-1 is located on the outer surfa.ce of the thylakoid. 57. (4 ) Identical twins are p roduced d uring one birth, resu lting from the division of a single fertilized egg. They are of the different sex and genetically ide ntical. 58. (3 ) The preferred method for determining the mineral requirements of a plant is called hydroponics (or water culture) . Hydroponics allows plants to grow weU if they are supplied with all tl)e mineral nutrients they need. 59. ( 1) 60. (3 ) A m icrotubule structure that brings about chromosomal movement during cell division is called spindle. PART4.6ENERALKNOWLED6E 1. Who waa the fl n t non – Indian to receive the Bharat Ratna? (1) Martin Luther Kin g (2) Zubin Me hta (3) Mother Teresa (4) Kh an Abdul Ghaffar Khan 2. The Satanic Venea’ Ia a book Written by {1) Keri Hulme {2) Salman Rushdie (3) Oenie l Pipes (4 ) Shaul Bakhash 3. Who among the following got the Nobel Prlze for the clJacovery of neutron? (1) James Ch adwick (2) J .J. Thomson (3) C.V. Raman (4 ) Niel Bohr 4. Who produced the flnt automobile? ( 1) Rudolf Diesel {2) Carl Benz (3) Henry Ford (4) Gottleib Daimler 5. Kathakalll• a dance of ( 1) Tamil Nadu (2 ) Kerala (3) Uttar Pradesh (4) Manipur 6 . The lint Aalan Gama weN help Ill (1) Seoul (2 ) New Delhi www.examrace.com (3) Dhaka (4 ) Colombo 7. Which eminent political personality played an Important role In the drafting of the Indian Constitution? { 1} B .R. Ambedkar (2 ) Dr. Rajendra Prasad (3 ) Sardar Patel (4 ) Jawaharlal Nehru 8 . Whlc.h country has won the world cup Foot ball 1998? ( 1) France (2) Argentina (3) Brazil (4 ) Italy 9 . The flnt astronaut to set foot on the moon was (1) Edwin Aldrin (2 ) Alan Shepherd (3 ) Niel Armstrong (4 ) Yuri Gangarin • 10. Mansoor All Khan Is well-known In India •• ( 1) an outstanding sportsman (2 ) an Urdu novelist (3) a sarod player (4 ) a classical singer 11. The terms •ae..n• and ‘Bulls’ refer to those speculators who believe that prices of shares will ( 1) come down and remain constant respectively (2) go up and remain constant respectively (3) go up and come down respectively (4 ) come down and go up respectively 12. The United NationaJ Day Js observed annually on (1) 14th November (2) 30th October (3 ) 24th October (4 ) 6th June 13. ‘ March 8’ is celebrated as ( 1) World Health Day (2 ) National Integration Day (3) Human Ri ghts Day (4 ) International Women’s Day 14. Which of the following Is the tndi· genously developed multi-barrel rocket system of the JndJan Anny? (1) Trishul (2 ) Pinaka (3) Akash (4) Prithvi 15. Vllayat Khan Is associated with ( 1) Rudra Veena (2 ) Shehnai (3) Sitar (4 ) Sarod 16. The author of the famous novel, “Anan· damath” ls (1) Surendra Nath Banerjee (2 ) Keshav Chandra Sen (3 ) Subhas Chandra Bose (4 ) Bankim Chandra Chatterjee 17. Which one of the following etates Juds In the production of Coffee In Jn- ~a? . ( 1) Kerala (2) Goa (3 ) Kamataka (4 ) Tamil N&du 18. ‘ Booker Prize’ is awarded for which of the following fields? (1) Sports (2) Social Services (3) Literature (4 ) None of these 19. Trlpltakasls a sacred book of (1) Hinduism (2) Sikhism (3) Budhism (4) Jainism 20. The present decimal system of numbers was the invention of { 1} Romans {2 ) Indians (3) Greeks (4) Egyptians ANSWERS 1.(4) 2 .(2) 3.(1 ) 4 .(2) 5. {2} 6. {2} 7.{1} 8.{ 1} 9.{3 } 10.(1 ) 11. (4) 12 .(3} 13.(4) 14.(2) 15.(3) 16.(4) 17 .(3) 18. (3) 19. (3) 20 .( 2).