Question

What is the SI unit of molal elevation constant ($k_b$) for a solvent?

Answer 1

Molal elevation constant is the elevation in boiling point when $1$ mole of solute is dissolved in one kg of solvent.

$K_b=\frac{\Delta T_B}{m}(K.kg.{mol}^{-1})$

Where, $\Delta T_B\to$ elevation in boiling point

$m\to$ molality

As the S.I unit of $\Delta T_B$ is kelvin and that of molality is $mol/kg$, the S.I unit of $K_b$ is $(K.kg.mo{l}^{-1})$