The Freezing point of ether was lowered by $0.60^{\large\circ}$C on dissolving 2.0gm of phenol in 100g of ether.Calculate the molar mass of phenol and comment on the result.Given $K_f$(ether)=$5.12Kkg mol^{-1}$

Question

$\begin{array}{1 1}170.7gmol^{-1}\\270.7gmol^{-1}\\370.7gmol^{-1}\\470.7gmol^{-1}\end{array}$