JEE MAINS TEST - 2015

XII (JEE MAINS) CHEMISTRY SOLUTION DATE : 19-03-2015

1. (D) NO2 (acidic, paramagnetic, brown ) , N2O4 (neutral, diamagnetic, colourless )

2. (B) at high pressure PV

anP

2

2

3. (A) Alkali metal on hydrolysis produce hydrogen gas

4. (C) From kohlrausch law ˄ 0000NaClHClNaOAcAcOH

5. (B) In NaCl crystal sodium and chlorine atom are in contact therefore ClNa

rra2

6. (B) As no. of particle increase freezing point decrease

7. (C) In dispropornation oxidation no. of same element increase as well decrease

8. (B) In SN1 reaction reactivity order is 000 123

9. (B) In duma’s method %501004.1

560

22400

28% N

10. (C) Orange is complementary colour of blue

11. (C) Enthalpy is extensive property.

12. (B) solid are not consider in Kp equation high pressure

13. (B)

14. (A) First alkene then addition of HCl

15. (C) It is Hoffman bromomide reaction

16. (C) H bonding

17. (D)

Equation – 1 is not balanced w.r.t. charge.

Equation – 2 gives K3[Cu(CN) 4] as product.

Equation – 3 reaction is unfavourable in the forward direction (K2O is unstable, while Li2O is stable).

Equation – 4 is correct & balanced.

18. (A) Benzoic acid is more acidic then Phenol

19. (c) With respect to A order is 1, with respect to B order is 2 and with respect to C order is 0

20. (B) In Eq. (1) FeCl2 cannot be reduced when heated in air.

In Eq. (3) Fe2(SO4)3 cannot convert to Fe on heating; instead oxide(s) will be formed.

In Eq. (4) FeSO4 cannot be converted to Fe on heating; instead oxide(s) will be formed.

Hence Eq. (2) is correct.

21. (c) In aqueous solution secondary amine is more basic

22. (A) Cane sugar

23. (A) max. 7e-

24. (D)

25. (A)

26. (C) Suppose mass of both gas is x gm then3

2

3216

164

xx

x

PCH 3

1

3216

322

xx

x

PO

27. (c) Copolymer is addition polymer in which both reacting unit are different

28. (A) If oxidation no. is same then as electronagativity decrease acidic nature decrease

29. (B) RTnEH g

30. (D) LiAlH4 convert Aldehyde in to alcohol.