RMgI when treated with ice cold water liberated a gas which occupied 1.4 dm^3 / g at STP. The gas produced is further reacted with iodine in presence…

RMgI when treated with ice cold water liberated a gas which occupied $\displaystyle 1.4 \mathrm{dm}^3 / \mathrm{g}$ at STP. The gas produced is further reacted with iodine in presence of $\displaystyle \mathrm{HIO}_3$ to give compound (X). Compound (X) in presence of Na and dry ether produced compound $\displaystyle (\mathrm{Y})$. Molar mass of compound $\displaystyle (\mathrm{Y})$ is $\displaystyle \_\_\_\_$ $\displaystyle \mathrm{g} \mathrm{mol}^{-1}$. (Nearest integer)