FIITJEE PET III (REG_1 ST YEAR)

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1 FIITJEE PET III (REG_1 ST YEAR) MAINS DATE: Time: 3 hours Maximum Marks: 360 INSTRUCTIONS: Instructions to the Candidates 1. This Test Booklet consists of 90 questions. Use Blue/Black ball Point Pen only for writing particulars and bubbling of OMR.. For each correct answer 4 Marks will awarded and for each wrong answer 1 Mark will be deducted. 3. Attempt all questions. 4. In case you have not darkened any bubble you will be awarded 0 mark for that question. 5. Use of calculator/logarithmic table is not permitted. Don t write / mark your answers in this question booklet. If you mark the answers in question booklet, you will not be allowed to continue the exam. NAME: ENROLLMENT NO.: FIITJEE (Hyderabad Classes) Limited /B, Saifabad, (Opp. Secretariat) Hyderabad Ph: Fax: FIITJEE Limited. 97, Plot No.1, (Opp. Patel Kunta) Huda Park, Vijaynagar Colony, Kukatpally, Hyderabad Ph : FIITJEE Limited. Plot No. 39A, (Opp. Sashi Hospital), Gaddiannaram, Dilsukhnagar, Hyderabad, Ph:

2 PET-III (1 ST YEAR)-SET-A-019-MPC- sin 1. If tan 3 tan = 4, then value of cos3 is (A) (B) 4 (C) 6 (D) 8. If cos x cos x cos x cos x 3, then a c a b c d b d is (A) a b (B) c d (C) b c (D) c a 3. If x = r sin cos, y = r sin sin, z = r cos, then the value of x + y + z is independent of (A), (B) r, (C) r, (D) r 4. If a sec c tan = d, and b sec + d tan = c, then (A) a + c = b + d (B) a + d = b + c (C) a + b = c + d (D) ab = cd 5. Value of cos cos cos sin sin sin is (A) 0 (B) (C) 1 (D) If A + C = B, then tan A tan B tan C is equal to (A) tan A + tan B + tan C (B) tan B tan C tan A (C) tan A + tan C tan B (D) (tan A tan B + tan C) 7. If cos 6 = x cos, then cos 4 = (A) x 1 (B) x (C) x 1 (D) x 1 8. sin A + sin 3A + sin 5A + sin 7A = (A) 4 sin A cos A cos 4A (C) 4 cos A cos A sin 4A (B) 4 cos A sin A sin 4A (D) 4 sin A cos A cos 4A 9. cos ( + + ) + cos ( ) + cos ( ) + cos ( ) = (A) cos cos cos (B) 3 cos cos cos (C) 4 cos cos cos (D) 6 cos cos cos 10. If x + 1 x = cos, then 1 x3 + 3 x = (A) sin 3 (B) cos 3 (C) 3 sin (D) 3 cos Space for rough work FIITJEE (Hyderabad Classes) Limited /B, Saifabad, (Opp. Secretariat) Hyderabad Ph: Fax: FIITJEE Limited. 97, Plot No.1, (Opp. Patel Kunta) Huda Park, Vijaynagar Colony, Kukatpally, Hyderabad Ph : FIITJEE Limited. Plot No. 39A, (Opp. Sashi Hospital), Gaddiannaram, Dilsukhnagar, Hyderabad, Ph:

3 PET-III (1 ST YEAR)-SET-A-019-MPC If tan x = b a, then ab ab ab a b = sinx cosx (A) (B) sinx cosx (C) cosx sinx (D) sinx cosx 1. If cos 6 + sin 6 + k sin = 1, then k = (A) 3 3 (B) (C) 3 4 (D) If (a b) sin ( + ) = (a + b) sin ( ), then tan tan is (A) b (B) a (C) a b (D) a b a b a b a b 14. Find the minimum value of tan sec is (A) 10 (B) 0 (C) 30 (D) If A + B = 3 and cos A + cos B = 1, and (3 < A B < 4), then value of cos A cos B is (A) 1 3 (B) 3 (C) (D) If 100 times the 100 th term of an A.P with non-zero common difference equals the 50 times its 50 th term, then 150 th term of this A.P is (A) 150 (B) 150 (C) 0 (D) If the sum of m terms of an A.P is equal to the sum of n terms of that A.P, then sum of (m + n) terms is [m n] (A) m + n (B) m n (C) m m (D) n m 18. n n n If x = a, y = b, z = c, where a, b, c are in A.P and a < 1, b < 1, c < 1, then x, y, z are n0 n0 n0 in (A) G.P (B) A.P (C) H.P (D) none of these Space for rough work FIITJEE (Hyderabad Classes) Limited /B, Saifabad, (Opp. Secretariat) Hyderabad Ph: Fax: FIITJEE Limited. 97, Plot No.1, (Opp. Patel Kunta) Huda Park, Vijaynagar Colony, Kukatpally, Hyderabad Ph : FIITJEE Limited. Plot No. 39A, (Opp. Sashi Hospital), Gaddiannaram, Dilsukhnagar, Hyderabad, Ph:

4 PET-III (1 ST YEAR)-SET-A-019-MPC upto 10 terms, then the sum of those 10 terms is (A) 80 (B) 300 (C) 80 (D) If a, b, c are unequal numbers such that a, b, c are in A.P and b a, c b, a are in G.P, then a : b : c is (A) 1 : : 3 (B) 1 : 3 : 5 (C) : 3 : 4 (D) 1 : : If,, are in H.P, then a b c (A) a, b, c are in G.P (C) b + c, c + a, a + b are in A.P (B) a, b, c are in H.P (D),, are in A.P b c ca ab H1 a Hn b. If H 1, H,..., H n are n harmonic means between a and b (a b), then the value of H1 a Hn b (A) n + 1 (B) n 1 (C) n (D) n If a, b, c are in H.P and ab + bc + ca = 15, then value of ca is (A) 5 (B) 7 (C) 9 (D) If a, b, c, d are positive real numbers such that a + b + c + d =, then m = (a + b)(c + d) satisfies the relation (A) 0 < m 1 (B) m 3 (C) 3 < m < 4 (D) 1 < m < 5. The sum of integers lying between 1 and 100 (both inclusive) and divisible by 3 (or) 5 (or) 7 is (A) 818 (B) 188 (C) 838 (D) If a 1, a, a 3,..., a 0 are A.Ms between 13 and 67, then the maximum value of a 1 a a 3... a 0 is (A) (0) 0 (B) (40) 0 (C) (60) 0 (D) (80) 0 (A) 1 (B) Suppose a, b, c are in A.P and a, b, c are in G.P. If a > b > c and a + b + c = 3, the value of a is (C) 1 1 (D) The HM of two numbers is 4 and let their A.M be A and G.M be G. If A + G = 7, then the numbers are (A) 3 and 1 (B) 5 and 55 (C) 5 and 4 (D) 3 and 6 Space for rough work FIITJEE (Hyderabad Classes) Limited /B, Saifabad, (Opp. Secretariat) Hyderabad Ph: Fax: FIITJEE Limited. 97, Plot No.1, (Opp. Patel Kunta) Huda Park, Vijaynagar Colony, Kukatpally, Hyderabad Ph : FIITJEE Limited. Plot No. 39A, (Opp. Sashi Hospital), Gaddiannaram, Dilsukhnagar, Hyderabad, Ph:

5 PET-III (1 ST YEAR)-SET-A-019-MPC-5 a1 a an 9. If a 1, a, a 3,..., a n are in H.P, then,, a a a a a a a a a a (A) AP (B) GP (C) HP (D) AGP 3 n 1 3 n 1 3 n 1 are in 30. If a b,b, b c are A.P, then a, 1, c are in 1ab 1bc b (A) AP (B) GP (C) HP (D) none of these 31. If a 1 and a are two non collinear unit vectors and if a1 a 3, then the value of (a1a ) (a1a ) is (A) (B) 3/ (C) 1/ (D) 1 3. Let 1 and be the angles made by A& A with the positive x axis (A) tan1 tan (B) tan1 tan (C) if tan is given, then direction of A is uniquely determine (D) None of these 33. The resultant of the three displacement vectors 0 P, PQ and is QR (A) 15 cm (B) 17 cm (C) 149cm (D) 107cm Y O 5 cm 37 0 P 6 cm R 4 cm Q X 34. If AB CD, then select the correct alternative (A) B is parallel to C D (B) A is perpendicular to C (C) component of C along A = component of D along A (D) component of C along A = component of D along A 35. If A B C, and the magnitudes of A,B,C are 5,4 and 3 units, then the angle between A and C is (A) cos 5 (B) cos 5 (C) sin 4 (D) Space for rough work FIITJEE (Hyderabad Classes) Limited /B, Saifabad, (Opp. Secretariat) Hyderabad Ph: Fax: FIITJEE Limited. 97, Plot No.1, (Opp. Patel Kunta) Huda Park, Vijaynagar Colony, Kukatpally, Hyderabad Ph : FIITJEE Limited. Plot No. 39A, (Opp. Sashi Hospital), Gaddiannaram, Dilsukhnagar, Hyderabad, Ph:

6 PET-III (1 ST YEAR)-SET-A-019-MPC The angle which the vector A i ˆ3j ˆ makes with the y axis, where x axes and y axes, respectively, is 1 1 cos 3 / 5 cos / 3 (A) (B) 1 (C) tan / 3 î and ĵ are unit vectors along 1 (D) sin / Given P 3i ˆ4j ˆ. Which of the following is perpendicular to P? (A) 3i ˆ (B) 4j ˆ (C) 4i ˆ 3j ˆ (D) 4i ˆ 3j ˆ 38. Given A 4i ˆ6j ˆ and B i ˆ3j ˆ. Which of the following is correct (A) AB 0 (B) A.B 4 (C) A 1 B (D) A and B are antiparallel 39. Choose the wrong statement (A) Three vectors of different magnitude may be combined to give zero resultant. (B) Two vectors of different magnitudes can be combined to give a zero resultant (C) The product of a scalar and a vector is a vector quantity. (D) All of the above are wrong statements 40. The vectors sum of two forces is perpendicular to their vector difference. The force are (A) Equal to each other (B) Equal to each other in magnitude (C) Not equal to each other in magnitude (D) Cannot be predicted 41. The resultant of two vectors P and Q is R. If the magnitude of Q is doubled, the new resultant vector becomes perpendicular to P. Then, the magnitude of R is equal to (A) P+Q (B) P (C) P Q (D) Q 4. The components of a vector along the x and y directions are (n+1) and 1, respectively. if the 0 coordinate system is rotated by an angle 60, then the components change to n and 3. The value of n is (A) (B) 0 cos60 (C) 0 sin60 (D) 3.5 Space for rough work FIITJEE (Hyderabad Classes) Limited /B, Saifabad, (Opp. Secretariat) Hyderabad Ph: Fax: FIITJEE Limited. 97, Plot No.1, (Opp. Patel Kunta) Huda Park, Vijaynagar Colony, Kukatpally, Hyderabad Ph : FIITJEE Limited. Plot No. 39A, (Opp. Sashi Hospital), Gaddiannaram, Dilsukhnagar, Hyderabad, Ph:

7 PET-III (1 ST YEAR)-SET-A-019-MPC In p 4pq3q, find dp dq. 6q 49 (A) 3p 4q (C) 6q 4p 3p 4q (B) 3p 4q 6q 4p 3p 4q (D) 6q 4p 44. Which of the following two statements is more appropriate? (A) Two velocities are added using triangle rule because velocity is vector quantity (B) Velocity is a vector quantity because two velocities are added using triangle rule. (C) Both are same (D) None of these 45. Vector a is increased by a. If increment in magnitude of a is greater than magnitude of increment vector then angle between a and a is (A) greater than /6 (B) exactly / 6 (C) exactly / (D) belongs to a Null set 46. What is the component of 3i ˆ 4j ˆ along ˆ i ˆ j. 1 ˆ i ˆ j 3 ˆ i ˆ j (A) (B) (C) 5 ˆ i ˆ j (D) 7 ˆ i ˆ j 47. The velocity of a particle varies with time as per the law V a bt where a and b are two constant vectors. The time at which velocity of the particle is perpendicular to velocity of the particle at t= 0 is a a a.b (A) (B) (C) (D) None of these a.b a.b a 48. If A,B,C are mutually perpendicular vectors then which of the following statements is wrong? (A) CAB 0 (B) A B C AB C (C) A.B B.C C.A 0 (D) B C is perpendicular to A Space for rough work FIITJEE (Hyderabad Classes) Limited /B, Saifabad, (Opp. Secretariat) Hyderabad Ph: Fax: FIITJEE Limited. 97, Plot No.1, (Opp. Patel Kunta) Huda Park, Vijaynagar Colony, Kukatpally, Hyderabad Ph : FIITJEE Limited. Plot No. 39A, (Opp. Sashi Hospital), Gaddiannaram, Dilsukhnagar, Hyderabad, Ph:

8 PET-III (1 ST YEAR)-SET-A-019-MPC-8 ' 49. If fx xgx where g4 and ', find f 4 g 4 3 (A) 6 (B) 6.5 (C) 8 (D) None of these 50. Differentiate y x sinx (A) x cosx xsinx (B) xcosx (C) x sinx xcosx (D) None dy 51. Find the value of at t 0 if y 3 sinx and x t. dt (A) 0 (B) 6 (C) 3 (D) m 5. Circle s changing area : The radius of a circle is changing at the rate of. sec circle s area changing when r 10 m? (A) 80 (B) +40 (C) 40 (D) +80 At what rate is the 53. Velocities of two particles : At time t sec, the positions of two particles on a coordinate line are 3 3 s1 3t 1t 18t 5 m and s t 9t 1tm. When do the particles have the same velocities? (A) t 1sec,t.5 sec (B) t sec;t.5 sec (C) t.5sec;t 3sec (D) None of these 54. Resistors connected in parallel : If two resistors of R 1 and R ohms are connected in parallel in an electric circuit to make an R ohm resistor, the value of R can be found from the equation R R R 1 If R 1 is decreasing at the rate of 1 ohm/sec and R is increasing at the rate of 0.5 ohm/sec, at what rate is R changing when R1 75 ohms and R 50 ohms? (A) 0.0 / sec (B) 0.0 / sec (C) 0.04 / sec (D) 0.04 / sec Space for rough work FIITJEE (Hyderabad Classes) Limited /B, Saifabad, (Opp. Secretariat) Hyderabad Ph: Fax: FIITJEE Limited. 97, Plot No.1, (Opp. Patel Kunta) Huda Park, Vijaynagar Colony, Kukatpally, Hyderabad Ph : FIITJEE Limited. Plot No. 39A, (Opp. Sashi Hospital), Gaddiannaram, Dilsukhnagar, Hyderabad, Ph:

9 PET-III (1 ST YEAR)-SET-A-019-MPC Find the points on the curve y x 6x 4 where the tangent line is horizontal. (A) x 0, 3 (B) x 3 (C) x 3 (D) None of these x 56. Find an equation of the tangent line to the curve y e / 1 x at the point (1,e/) (A) y=e/ (B) y = 0 (C) y=1 (D) y= x+ 57. At what angle the vector A B 1 A B (A) cos A B (C) cos 1 A B A B and A B must act, so that the resultant is 1 A B (B) cos A B (D) cos 1 A B B A A B 58. Two vectors A and B have magnitudes and respectively. It is found that A.B A B, then the value of A B will be A B (A) 5 (B) 5 (C) 1 1 (D) If the resultant of two vectors having magnitudes of 7 and 4 is 3, then the magnitude of the cross product of the two vectors will be. (A) 8 (B) 65 (C) 33 (D) zero 60. The adjacent sides of a parallelogram is represented by vectors i ˆ 3j ˆ and ˆ i 4j ˆ. The area of the parallelogram is (A) 5 units (B) 3 units (C) 8 units (D) 11 units Space for rough work FIITJEE (Hyderabad Classes) Limited /B, Saifabad, (Opp. Secretariat) Hyderabad Ph: Fax: FIITJEE Limited. 97, Plot No.1, (Opp. Patel Kunta) Huda Park, Vijaynagar Colony, Kukatpally, Hyderabad Ph : FIITJEE Limited. Plot No. 39A, (Opp. Sashi Hospital), Gaddiannaram, Dilsukhnagar, Hyderabad, Ph:

10 PET-III (1 ST YEAR)-SET-A-019-MPC Calculate the wavelength (in nm) associated with a proton moving at 1.0 x 10 3 ms 1 : (h = 6.63 x Js, mass of proton = 1.67 x 10 7 kg) (A) 0.03 nm (B) 0.40 nm (C).5 nm (D) 14.0 nm 6. The de Broglie wavelength of a tennis ball mass 60g moving with a velocity of 10 m per second is approximately : (A) m (B) 10 5 m (C) m (D) m 63. Wavelength of a photon is. x m, h = 6.6 x Js. The momentum of photon is : (A) 3.3 x 10 3 kg ms 1 (B) 3.3 x 10 kg ms 1 (C) 1.45 x kg ms 1 (D) 6.89 x kg ms The de Broglie wavelength of a particle with mass 1g and velocity 100 m/s is : (A) 6.63 x m (B) 6.63 x m (C) 6.63 x m (D) 6.65 x m 65. In an atom, an electron is moving with a speed of 600 m/s with an accuracy of 0.005%. Certainty with which the position of the electron can be located is : (h = 6.6 x kg m s 1, e m = 9.1 x kg) (A) 1.5 x 10 4 m (B) 5.10 x 10 3 m (C) 1.9 x 10 3 m (D) 3.84 x 10 3 m 66. Uncertainty in the position of an electron (mass 9.1 x kg) moving with a velocity 300 ms 1, accurate upto 0.001% will be : (A) 19. x 10 m (B) 5.76 x 10 m (C) 1.9 x 10 m (D) 3.84 x 10 m 67. The wavelength of a golf ball weighing 00g and moving with a speed of 5m/h is of the order : (A) m (B) 10 0 m (C) m (D) m 68. If uncertainty in position of electron is zero, the uncertainty in its momentum would be : (A) zero (B) h/ (C) 4/ (D) Infinity 69. Uncertainty in position of a minute particle of mass 5g in space is 10 5 m. the uncertainty in its velocity (in ms 1 ) is : (A).1 x (B) 0.5 x (C).1 x 10 8 (D) 0.5 x The wavelength of the radiations emitted, when in a hydrogen atom electron falls from infinity to stationary state is : (R H = x 10 7 m 1 ) (A) 9.1 x 10 8 nm (B) 19 nm (C) 406 nm (D) 91 nm Space for rough work FIITJEE (Hyderabad Classes) Limited /B, Saifabad, (Opp. Secretariat) Hyderabad Ph: Fax: FIITJEE Limited. 97, Plot No.1, (Opp. Patel Kunta) Huda Park, Vijaynagar Colony, Kukatpally, Hyderabad Ph : FIITJEE Limited. Plot No. 39A, (Opp. Sashi Hospital), Gaddiannaram, Dilsukhnagar, Hyderabad, Ph:

11 PET-III (1 ST YEAR)-SET-A-019-MPC The shortest for the Lyman series is : (Given R H = cm 1 ) : (A) A (B) A (C) A (D) A 7. The first emission line of Balmer series for H spectrum has the wave no. equal to cm 1 : 9RH 7RH 3RH 5RH (A) (B) (C) (D) What transition in He+ ion shall have the same wave number as the first line in Balmer series of hydrogen atom? (A) 3 (B) 6 4 (C) 5 3 (D) Which electron transition in a hydrogen atom requires the largest amount of energy? (A) from n = 1 to n = 3 (B) from n = to n = 3 (C) from n = to n = 1 (D) from n = 3 to n = The frequency of first line of Balmer series in hydrogen atom is v 0. The frequency of corresponding line emitted by singly ionized helium atom is : (A) v 0 (B) 4v 0 (C) v 0 / (D) v 0 /4 76. Which are the ascending order of wavelength? (A) H, H, H,. Lines in Balmer series of hydrogen atom (B) Lyman limit, Balmer limit, Paschen limit in the hydrogen spectrum (C) Blue, violet, yellow, red colours in solar spectrum (D) None of these 77. Transition from n = 4, 5, 6 to n = 3 in hydrogen spectrum gives : (A) Lyman series (B) Paschen series (C) Balmer series (D) pfund series 78. In the atomic spectrum of hydrogen the series of lines observed in the visible region is : (A) Balmer series (B) Paschen series (C) Brackett series (D) Lyman series 79. The de Broglie s wavelength of electron in Bohr s 1 st orbit of He + is (A) 3.31 x m (B) 6.6 x m (C) 3.31 A 0 (D) A Angular momentum of an orbit of a H like species in which the electron revolving is JS. The number of waves made by the electron in that orbit. (A) 6 (B) 4 (C) 8 (D) Space for rough work FIITJEE (Hyderabad Classes) Limited /B, Saifabad, (Opp. Secretariat) Hyderabad Ph: Fax: FIITJEE Limited. 97, Plot No.1, (Opp. Patel Kunta) Huda Park, Vijaynagar Colony, Kukatpally, Hyderabad Ph : FIITJEE Limited. Plot No. 39A, (Opp. Sashi Hospital), Gaddiannaram, Dilsukhnagar, Hyderabad, Ph:

12 PET-III (1 ST YEAR)-SET-A-019-MPC The momentum of a particle associated with de Brogli e wave length of 6 0 A is (A) 1.1 x 10 4 kg ms (B) 1.1 x kg ms 1 (C) 39.6 x kg ms 1 (D) 39.6 x 10 4 kg ms 1 8. As the electron move away from the nucleus. The difference in the energy of the two adjacent orbits. (A) Increases (B) Decreases (C) remain same (D) unpredictable 83. If the kinetic energy of a particle is doubled, the debroglie wave length becomes 1 (A) times (B) 4 times (C) times (D) times 84. The ratio of de Broglie s wavelengths of protons accelerated through the potentials of 5V and 100 V is (A) 1 : (B) : 1 (C) 1 : 4 (D) 4 : The species showing the shortest wavelength when the electron transition takes places from n = 4 to n 1 =. (A) Be +3 (B) Li + (C) He + (D) H 86. The no. of lines in the spectrum when an electron returns from 5 th level to first exited state. (A) 10 (B) 5 (C) 6 (D) If the series limit of wavelength of the Lyman series for the hydrogen atom is 91 A, then the series limit of wavelength for the Balmer series of the hydrogen atom is : (A) 91 A (B) 91 x A (C) 91 x 4A (D) 91/A 88. A photon has a wavelength. 0 A. Calculate its mass when moving with a speed equal to light. (A) kg (B) 10 4 kg (C) 10 kg (D) 10 3 kg 89. Identify the incorrect expression 4 nh ze me (A) V (B) V (C) E (D) mr nh nh nh r 4 me z 90. The correct increasing order of wavelength among the following (A) rays < x ray < UV < visible < IR (B) X ray < UV < visible < rays < IR (C) UV < visible < IR < ray < X ray (D) ray < UV < visible < IR < X ray Space for rough work FIITJEE (Hyderabad Classes) Limited /B, Saifabad, (Opp. Secretariat) Hyderabad Ph: Fax: FIITJEE Limited. 97, Plot No.1, (Opp. Patel Kunta) Huda Park, Vijaynagar Colony, Kukatpally, Hyderabad Ph : FIITJEE Limited. Plot No. 39A, (Opp. Sashi Hospital), Gaddiannaram, Dilsukhnagar, Hyderabad, Ph:

13 MATHEMATICS PHYSICS CHEMISTRY FIITJEE PET III (REG_1 ST YEAR) MAINS_SET A_ANSWERS DATE: A. C 3. A 4. C 5. A 6. B C 9. C 10. B 11. B 1. C 13. B 14. B 15. B 16. C 17. C 18. C 19. A 0. A 1. D. C 3. A 4. A 5. C 6. B 7. D 8. D 9. C 30. C 31. C 3. A 33. C 34. D 35. A 36. C 37. C 38. A 39. B 40. B 41. D 4. D 43. C 44. B 45. D 46. D 47. B 48. B 49. B 50. A 51. A 5. C 53. A 54. B 55. A 56. A 57. D 58. B 59. D 60. A 61. B 6. C 63. A 64. A 65. C 66. C 67. C 68. D 69. C 70. D 71. A 7. D 73. B 74. A 75. B 76. B 77. B 78. A 79. D 80. B 81. A 8. B 83. D 84. B 85. A 86. D 87. C 88. D 89. C 90. A

14 MATHEMATICS PHYSICS CHEMISTRY FIITJEE PET III (REG_1 ST YEAR) MAINS_SET B_ANSWERS DATE: D. C 3. A 4. A 5. C 6. B 7. D 8. D 9. C 10. C 11. A 1. C 13. A 14. C 15. A 16. B C 19. C 0. B 1. B. C 3. B 4. B 5. B 6. C 7. C 8. C 9. A 30. A 31. A 3. C 33. A 34. B 35. A 36. A 37. D 38. B 39. D 40. A 41. C 4. A 53. C 54. D 45. A 46. C 57. C 58. A 49. B 50. B 51. D 5. D 53. C 54. B 55. D 56. D 57. B 58. B 59. B 60. A 61. A 6. B 73. D 74. B 65. A 66. D 77. C 78. D 69. C 70. A 71. B 7. C 73. A 74. A 75. C 76. C 77. C 78. D 79. C 80. D 81. A 8. D 83. B 84. A 85. B 86. B 87. B 88. A 89. D 90. B

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