Consider the following reactions. Total number of electrons in the bonds and lone pair of electrons in the product (X) is :

Step-by-step solution

The starting material is an aldohexose (like D-glucose). On prolonged heating with HI , it undergoes reduction to form n-hexane. This indicates that all six carbon atoms are linked in a straight chain. CHO -( CHOH )₄- CH ₂ OH HI, CH ₃- CH ₂- CH ₂- CH ₂- CH ₂- CH ₃ (n-hexane) n-Hexane, when passed over heated V₂O₅ at 773 K and 10-20 atm pressure, undergoes aromatization (dehydrogenation and cyclization) to form benzene. n-hexane V₂O₅, 773 K, 10-20 atm C ₆ H ₆ (Benzene) Benzene reacts with benzoyl chloride ( C ₆ H ₅