Question

Benzene is subjected to the following sequence of reactions:
\[ \text{Benzene} \xrightarrow[\text{}]{\text{1) } CH_3Cl/AlCl_3} \xrightarrow[\text{}]{\text{2) } Cl_2/AlCl_3} \xrightarrow[\text{}]{\text{3) } K_2Cr_2O_7/H^+} X \] If \(p\) gram of \(X\) reacts with \(NaHCO_3\), then \(11.2\ dm^3\) of gas is obtained at STP. Calculate \(p\).

Hint:

Whenever an alkyl benzene is oxidized with strong oxidizing agents like \(K_2Cr_2O_7/H^+\), the entire side chain is converted into \(COOH\), provided at least one benzylic hydrogen is present.

Answer 1

Correct Answer: 78.25