Common Ion Effect

Q.

The solubilities of $AgCl$ in water, 0.01 M $CaC{l}_2$, 0.01 M $NaCl$ and 0.05 M $AgN{O}_3$ are denoted by $S_1,S_2,S_3,S_4$ respectively. Which of the following relationships are correct? $K_{sp}=1.8\times {10}^{-10}$

1. $S_1>S_2$
2. $S_2>S_3$
3. $S_3>S_4$
4. $S_4>S_1$

Q.

The addition of sodium acetate to 0.1 M acetic acid will cause

1. no change in pH value

2. change in pH which cannot be predicted

3. increase in its pH value

4. decrease in its pH value

Q. In which of the following, dissociation of $N{H}_{4}OH$ will be minimised

1. 
2. 
3. 
4. 

Q. Acetic acid dissociates in an equilibrium with acetate ion and proton. When a small amount of HCl is added:

1. the equilibrium constant will increase

2. acetate ion concentration increases

3. acetate ion concentration decreases

4. the equilibrium constant will decrease

Q. The correct decreasing order of solubility of AgCl in the following solutions

1. 0.1 M ${\mathrm{NH}}_3$
2. Water
3. 0.1 M $\mathrm{NaCl}$
4. 0.1 M $BaC{l}_2$

Q. Increase in pH when sodium acetate is added to 0.1 M acetic acid is due to common ion effect

1. True
2. False

Q.

What would be the hydrogen ion concentration in a solution containing 0.04 mole of acetic acid and 0.05 mole of sodium acetate in 500 ml of the solution?
Dissociation constant for acetic acid is 1.8 x ${10}^{-5}$.
The [ $H^{+}$] is:

1. 1.44 $\times$ ${10}^{-5}$

2. 3.88 $\times$ ${10}^{-2}$

3. 14.5 $\times$ ${10}^{-9}$

4. none of the above

Q. The dissociation constant for $H_{2}S$ and $H{S}^{-}$ are respectively ${10}^{-7}and{10}^{-13}$. The pH of $0.1M$ aqueous solution of $H_{2}S$ will be :

1. 4
2. 5
3. 3
4. 2.5

Q. Which of the following is a polyprotic acid?

1. $H_{2}S{O}_4$
2. $H_{2}C{O}_3$
3. All of the above.
4. $H_2{C}_2{O}_4$

Q. For an aqueous solution of a weak electrolyte $C{H}_{3}COOH$, how does the presence of $C{H}_{3}COONa$ affect its degree of ionisation?

1. The degree of ionisation remains same.
2. The degree of ionisation decreases.
3. $C{H}_{3}COOH$ acts as a strong acid.
4. The degree of ionisation increases.