Question

The freezing point of equimolal aqueous solutions 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. $C_6{H}_{12}{O}_6$ (glucose)

Answer 1

Answer: (D)

$C_6{H}_{5}N{H}_{3}CI:i=2$ ;
$Ca(N{O}_3{)}_2:i=3$
$La(N{O}_3{)}_3:i=4;$
$C_6{H}_{12}{O}_6:i=1$
Lower the value of $i$, smaller will be the depression in freezing point, higher will be the freezing temperature, if molalities are equal. Hence, glucose solution will have highest freezing temperature.