Question

The freezing point of an equimolal aqueous solution will be highest for:

• A. $C_6{H}_{5}N{H}_{3}Cl$ (aniline hydrochloride)
• B. $Ca(N{O}_3{)}_2$
• C. $La(N{O}_3{)}_3$
• D. $C_{6}H{1}_2{O}_6\left(\text{glucose}\right)$

Answer 1

The correct option is D $C_{6}H{1}_2{O}_6\left(\text{glucose}\right)$

$\Delta T_f=K_{f}mi$
$n\left(C_6{H}_{5}N{H}_{3}Cl\right)=2$
$n\left(Ca\right(N{O}_3{)}_2)=3$
$n\left(La\right(N{O}_3{)}_2)=4$
$n\left(C_6{H}_{12}{O}_6\right)=1$
As n is minimum for glucose hence $\Delta T_f$ is minimum for it. So, the freezing point is maximum for it.