Question

A 2.0 molar sugar solution has approximately the same freezing point as 1.0 molar solution of:

• A. $CaC{l}_2$
• B. $C{H}_{3}COOH$
• C. $C_2{H}_{5}OH$
• D. $NaCl$

Answer 1

The correct option is D $NaCl$

For two solutions having the same freezing point, their product $i\times m$ must be same.

$i$ represents Van't Hoff factor and $m$ represent molality of the solution.

For sugar, $i\times m=1\times 2.0=2$

For $NaCl,i\times m=2\times 1.0=2$

Hence, option (D) is the correct answer.