Solns. Jee Mains'13

Topics: Alkaline earth metal, Friction, Alkali Pages: 18 (2055 words) Published: August 21, 2013
Vidyamandir Classes

ANSWERS - JEE MAINS Test - 1/IITJEE-2014
CHEMISTRY
1 D 11 D 21 C 2 D 12 C 22 B 3 D 13 B 23 D 4 C 14 C 24 B 5 C 15 B 25 B 6 B 16 C 26 B 7 A 17 C 27 B 8 B 18 D 28 A 9 D 19 D 29 B 10 A 20 C 30 D

PHYSICS
31
C

32
C

33
A

34
B

35
CANCEL

36
A

37
C

38
B

39
C

40
C

41
A

42
C

43
D

44
C

45
C

46
C

47
C

48
C

49
C

50
D

51
A

52
D

53
C

54
A

55
C

56
B

57
B

58
D

59
D

60
B

MATHEMATICS
61 D 71 C 81 C 62 B 72 B 82 A 63 C 73 C 83 C 64 B 74 B 84 C or D 65 D 75 B 85 D 66 C 76 D 86 D 67 B 77 A 87 D 68 D 78 B 88 B 69 D 79 C 89 C 70 A 80 D 90 A

VMC/JEE-2014

1

JEE MAINS Test - 1/Solutions

Vidyamandir Classes

Solutions to JEE MAINS Test - 1/IITJEE - 2014
[CHEMISTRY]
1.(D) 2.(D) 3.(D) C 2  C3 bond is of the type sp 2  sp3 . 1-butyne is terminal alkyne. It will give ppt with ammoniacal Cu2Cl2 solution. CH3 NH 2  CHCl3  3KOH  CH 3 NC  3KCl  3H2 O  Carbylamine test

4.(C)

OH | Tert. Pentyl bromide  CH3  C  CH  CH3  CH3  C  CH 2  CH3   E2 | | CH3 CH3 KCN (alc.)

H / H2 O

5.(C) 6.(B)

Cu+2 ions will get deposited and Zn+2 ions come into the solution but SO 2  will remain the same. 4 Tf  iK f m 10 3.72  i  1.86  74.5 100 1000 3.72  74.5 i  1.5 1.86  100  3.72  i  1.86  100 74.5

7.(A)

Calculate using PV = nRT T1  273K T2  546 K and 3R 2 T3  273K 3R 2  273  3.4 kJ

8.(B) 9.(D)

E  nCV T  1 
 Θ

  T2  T1  

N2O ONN CO2 O=C=O Both these species are isoelectronic as well as isostructural. N3H is isoelectronic but not isostructural with these two. 1 BrO 3 t   BrO3

10.(A) As we know 

t



 BrO3

t



1 3

 0.056  0.019 L mol1 s1

11.(D) BF3 being symmetric has net dipole = 0 but not in NF3 12.(C) The rate of effusion depends on area, moles and density as well. 13.(B) For a spontaneous process Stotal  0 (IIIrd law) 14.(C) Since volume is reduced to one fourth of initial volume. So the concentration will be four times and rate will be 16 times. Cl | 15.(B) (A) must be CH3  CH 2  C  CH 3 | Cl

16.(C) Assume that Rate = k[A]m [B]n Using initial rate method m = 1 and n = 1 Rate = k[A] [B]

VMC/JEE-2014

2

JEE MAINS Test - 1/Solutions

Vidyamandir Classes
2  104  k  102  2  102  k=1

17.(C)

18.(D) Increasing partial pressure will increase the solubility. 19.(D) XeF4 is square planar XeO3 is pyramidal 20.(C) pKb = 10.83 As we know for conjugate acid and conjugate base. pKa + pKb = 14 pKa = 3.17  K a  103.17  6.75  104 XeF6 is distorted octahedral XeO4 is tetrahedral

21.(C)

Cl | Et  N  CH 2  C H  COOH 3-(N, N-diethylamino) 2-chloropropanoic acid | Et

22.(B)

23.(D)

24.(B)

25.(B) Catalyst increases rate of both forward and backward reactions. It also provides alternative path. 26.(B) SiO2 is not a basic flux 27.(B) Refer to NCERT 28.(A) Refer to NCERT

29.(B) Sodium is softer than lithium. Reactivity of alkali metals increase down the group as the valence electron is easier to detach. Because of small size of lithium, it has high degree of hydration. 30.(D) Boiling point of alkaline earth metals is more than alkali metals. In air both N2 and O2 are present. Alkaline earth metals react with them to form oxide and nitride. For example : 2Mg(s)  O 2 (g)  2MgO2 (s)  3Mg(s)  N 2 (g)  Mg3 N 2 (s) 

VMC/JEE-2014

3

JEE MAINS Test - 1/Solutions

Vidyamandir Classes

Solutions to JEE MAINS Test - 1/IITJEE - 2014
[PHYSICS]
31.(C) S1  S2  S3  1 2 a 1 2 1  2  use S  vt  2   a  t   

32.(C) The block B will get separated from A if at instant of crossing the mean position, they have some momentum, then just after crossing the mean position the block A is relarted by both spring and frictional forces, but block B is retarted only by frictional forces. As the retardation by frictional force only is g  in...
Continue Reading

Please join StudyMode to read the full document

You May Also Find These Documents Helpful

  • JEE MAIN Essay
  • jee main Essay
  • Essay on Jee main 2013 weightage
  • 13 Essay
  • Main the Essay
  • SOLNS Essay
  • JEE Application Essay
  • Iit Jee Essay

Become a StudyMode Member

Sign Up - It's Free