07. on heating giving a gas is also given by

a) Heating b) Heating

c) d)

Ans:a. 

08. . The emf of the above cell is 0.2905 V. Equilibrium constant for the cell reaction is

a) b)

c) d)

Ans:b.
 

09. HX is a weak acid . It forms a salt NaX(0.1 M) on reacting with caustic soda. The degree of hydrolysis of NaX is

a) 0.01% b) 0.0001%

c) 0.1% d) 0.5%

Ans:a.
 

% degree of dissociation

10. Spontaneous absorption of a gas on solid surface is an exothermic process because

a) increases for system

b) increases for gas

c) decreases for gas

d) increases for gas

Ans:c. 
For spontaneous absorption is negative as well as the degree of randomness of gas molecules decreases thereby also negative. That's why is -ve

Tereby is -ve

11. For a monoatomic gas kenitic energy =E. The relation with rms velocity is

a) b)

c) d)

Ans:a. 
Since,

(c = rms velocity)

For 1 molecule

12. The pair of compounds having metals in their highest oxidation state is

a) b)

c)

d)

Ans:b. 

13. The compound having tetrahedral geometry is

a) b)

c) d)

Ans:d. 
,

3d 4s 4p

3d 4s 4p

Hybridisation of

Shape of Tetrahedral

14. Spin only magnetic of the compound is

a) b)

c) d)

Ans:b.
 

3d 4s 4p

n = 3

15. A sodium salt of an unknown anion when treated with gives white precipitate only on boiling. The anion is

a) b)

c) d)

Ans:b.
 

16. Which hydrogen like species will have same radius as that of Bohr orbit of Hydrogen atom ?

a) b)

c) d)

Ans: b.
 

so

17.

Arrange in order of increasing acidic strength

a) X > Z > Y b) Z < X > Y

c) X > Y > Z d) Z > X > Y

Ans:a. 
pKa value of carboxylic group is less than pKa of in amino acid and will have comparatively less pKa than due to effect of carboxylate group