(a) $1\cdot00$ molal aqueous solution of trichloroacetic acid is heated to its boiling point. Boiling point of this solution was found to be $100\cdot18^{\circ}\text{C}$. Calculate the van't Hoff factor for trichloroacetic acid. (Given : $ ext{K}_\text{b}$ for water $= 0\cdot512 \text{ K kg mol}^{-1}$) OR