Question

Observe the reaction set and identify A and D.

• A. figA
• B. figB
• C. figC
• D. figD

Hint:

Alkanes under chromium oxide catalyst at high temperature undergo aromatization. Toluene gives para product predominantly in Friedel-Crafts acylation.

Answer 1

The Correct Option is A

Concept: This problem combines oxidation of alkenes and aromatization followed by Friedel-Crafts reaction.

Step 1: Analyze first reaction. Cis-2-butene oxidation with acidic permanganate causes oxidative cleavage. Reagent: \[ KMnO_4/H^+ \] Produces acetic acid.

Step 2: Role of \(P_4O_{10}\). Phosphorus pentoxide is dehydrating agent. Converts acid into corresponding anhydride or removes water. Thus first reagent identified.

Step 3: Analyze second reaction. n-Heptane under catalyst \[ Cr_2O_3/Al_2O_3 \] undergoes aromatization producing toluene.

Step 4: Friedel Crafts acylation. Toluene reacts under \[ AlCl_3 \] Electrophilic substitution occurs mainly para position. Major product: \[ p\text{-acetyltoluene} \] Thus answer \[ \boxed{A} \]