Question

A solution of 1 molal concentration of a solute will have maximum boiling point elevation when the solvent is:

• A. ethyl alcohol
• B. acetone
• C. benzene
• D. chloroform

Answer 1

The correct option is D chloroform

As depression in freezing point is directly proportional to $k_f$ value as

$\Delta T_b=K_b\times m$

$\Delta T_b\alpha K_b$

we have,

$K_b\left(ethanol\right)={1.22}^{o}C/mol/kg$

$K_b\left(acetone\right)={1.67}^{o}C/mol/kg$

$K_b\left(benzene\right)={2.26}^{o}C/mol/kg$

$K_b\left(chloroform\right)={3.88}^{o}C/mol/kg$

thus, the correct answer is D.