Degree of Dissociation

Q.

When $0.004MN{a}_{2}S{O}_4$ is isotonic with 0.01M solution of glucose at same temperature.the apparent degree of dissociation of sodium sulphate is

1. 75%

2. 50%

3. 25%

4. 85%

Q. If ${\Lambda }_c$ for $N{H}_{4}OH$ is 11.5 $oh{m}^{-1}c{m}^{2}mo{l}^{-1}$, its degree of dissociation would be
(given that ${\lambda }^{\circ }N{H}_4^{+}$ = 73.4 and ${\lambda }^{\circ }O{H}^{-}$ = 197.6 $oh{m}^{-1}c{m}^{2}mo{l}^{-1}$ )

1. 0.0848
2. 0.0424
3. 0.0212
4. 0.004