02. REV FULL TEST-1 JEE MAIN-2020 KEY & SOLREV_FULL+TEST... · 1 ñ 1 Û 1 x x , _ ] ð 1 1 ï w ð...

KUKATPALLY CENTRE: # 22-97, Plot No.1, Opp. Patel Kunta Huda Park, Vijaynagar Colony, Hyderabad - 500 072. Ph.: 040-64601123 MIYAPUR CENTRE: Above Sai Motors Maruthi Showroom, Allwyn X Road, Miyapur, Hyderabad.

INTERNAL TEST

SECOND YEAR 2018-20

REVISION FULL TEST-1

Q. No. KEY Q. No. KEY Q. No. KEY

1. D 26. B 51. B

2. C 27. B 52. A

3. B 28. B 53. A

4. A 29. B 54. A

5. B 30. A 55. B

6. C 31. B 56. C

7. C 32. C 57. C

8. B 33. A 58. B

9. B 34. B 59. C

10. A 35. B 60. B

11. B 36. A 61. A

12. C 37. C 62. B

13. B 38. A 63. B

14. D 39. B 64. D

15. D 40. B 65. C

16. C 41. D 66. C

17. C 42. D 67. B

18. D 43. B 68. B

19. C 44. D 69. B

20. C 45. B 70. C

21. 0 46. 3 71. 3

22. 3 47. 2 72. 8

23. 10 48. 4 73. 8

24. 4 49. 3 74. 2

25. 7 50. 3 75. 3


1.

2.

3.

4.


5.

6.

7.


8.

9.

10.


11.

12.

13.

14.

15.


16.

17.

18. Given planes are 4 x y z ---------- (1) and 2 4 x y z ---------- (2)

Since required plane passes through the line of intersection (1) & (2) Its equation is ( 4) ( 2 4) 0 x y z x y z

(1 ) ( 1) (2 1) (4 4) 0 x y z ---------- (3) Since (1) & (3) are perpendicular

1(1 ) 1( 1) 1(2 1) 0 1 1 2 1 0 3/ 2

Its equations is 3

( 4) ( 2 4) 02

x y z x y z

5 4 20 0 x y z


19.

So, Number of ways to arrange

20.

2 2

4 2 2 2n 2 n 2

2 2n 2

n 1 n 1n 1

41 n 2n n 1 n 1

1 1 1 5

4 16n 1 n 1

21.

22.


23.

24.

25.


26.

27.

28.

29.


30.

31.

32.


33.

34.

35.

1/ 2

0.693t

36. A

37.

38.

39.

40. B

41.


42.

43.

44.

45. B

Conceptual 46.


47.

48.

49.

50.


51. B Enthalpy of formation of NH3 = –46 kJ/mole N2 + 3H2 2NH3 Hf = – 2 x 46 kJ mol Bond breaking is endothermic and Bond formation is exothermic Assuming ‘x’ is the bond energy of N–H bond (kJ mol–1) 712 + (3 x 436)– 6x = –46 x 2 x = 352 kJ/mol 52. A Conceptual 53. A Conceptual 54. A Conceptual 55. B Only option (B) is having non–super imposable mirror image & hence one optical isomer.

Zn+

NH3

NH3

en

no optical isomer. It is

Tetrahedral with a plane of symmetry

Co+

Co+

en en

en

enen

en

optical isomer

( 1) ( 2)

2

3 3

H2O

H2O

Co+

H2O

H2O

en

Horizontal plane is plane of symmtry

Zn+

en

en

no optical isomer, it is

tetrahedral with a plane of symmetry

3) 4)

3

2

56. C

salt

pH pKa logacid

= 4.74 + 0.25

log0.05

= 4.74 + log5 = 5.44

57. C Conceptual 58. B Conceptual 59. C Conceptual 60. B Dibal Reduces acid into aldehyde which reacts with alcohol to form hemiacetal in acidic medium. 61. A Conceptual


62. B Conceptual 63. B Conceptual 64. D Conceptual 65. C Conceptual 66. C Benzoic acid dimerizes in benzene. In other cases neither association nor dissociation takes

place. 67. B Conceptual 68. B Since the reduction potential 3 2Mn /Mn

E is higher than 2Mn /MnE , the reaction Mn3+ Mn2+ is

favoured and the concentration of Mn3+ will decrease and that of Mn2+ will increase. 69. B

2 2CO g Cl g COCl g

Partial pressure 2 2 2 At equilibrium

2

2

COClP

CO Cl

p 2 1K

p p 2 2 2

70. C Conceptual 71. 3 Conceptual 72. 8

73. 8

74. 2

75. 3

02. REV FULL TEST-1 JEE MAIN-2020 KEY & SOLREV_FULL+TEST... · 1 ñ 1 Û 1 x x , _ ] ð 1 1 ï w ð...

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