Consider the following sequence of reactions to give the major product (X)
P g of the major product (X) formed is reacted with $\mathrm{NaHCO}_3$ solution to liberate a gas which occupied $11.2 \mathrm{dm}^3$ at STP. $$ \mathrm{P}=\ldots \mathrm{g} . $$ (Given molar mass in $\mathrm{gmol}^{-1} \mathrm{H}: 1 . \mathrm{C}: 12 . \mathrm{O}: 16 . \mathrm{Cl}: 35.5$ )