Question

Indicate the solution(s) in which compartment B will show an increase in volume.

• A. $1,2,4$
• B. $1,2$
• C. $2,3$
• D. $3,4$

Answer 1

Answer: (B)

Increase in volume of $B$ is because of the movement of solvent from A to B.

We have to check whether $C_B>C_A$.

For (1)st solution $0.1MKCl\Rightarrow KCl\to K^{+}C{l}^{-}$; $i=2$

$C_A=0.1\times 2=0.2$

$C_B=0.2\times 2=0.4$

$C_B>C_A$

For 2nd solution $NaCl\to N{a}^{+}+C{l}^{-}$; $i=2$

$C_A=\frac{0.1}{58.5}\times \frac{1000}{100}\times 2=0.0342$

$C_B=\frac{10}{58.5}\times \frac{1000}{100}\times 2=3.42$

$\therefore C_B>C_A$

1st & 2nd solution both have $C_B>C_A$

So option (B) is correct.