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