Question

$2\ g$ of a non-volatile non-electrolyte solute is dissolved in $200\ g$ of two different solvents A and B whose ebullioscopic constants are in the ratio of $1:8$. The elevation in boiling points of A and B are in the ratio $\frac xy\ (x : y)$. The value of $y$ is ______ . (Nearest Integer)

Answer 1

$ΔT_b = k_bm$
$\frac {(ΔT_b)_A}{(ΔT_b)_B} = \frac {(k_b)_A}{(k_b)_B}$
$⇒ \frac 18 = \frac xy$
$∴ y = 8$

So, the answer is $8$.