A compound [X] undergoes reactions as given. Identify compounds [C] and [D] formed in these reactions.

Step-by-step solution

The given starting compound is isopropyl phenyl ether, Ph-O-CH(CH₃)₂ . Reaction with concentrated HI leads to the cleavage of the ether. Due to the partial double bond character of the O-phenyl bond (arising from resonance), the cleavage occurs at the O-isopropyl bond. This yields phenol and isopropyl iodide. Ph-O-CH(CH₃)₂ + HI PhOH + CH₃-CH(I)-CH₃ Since [A] is the aromatic product, [A] is Phenol and [B] is Isopropyl iodide. Phenol [A] undergoes oxidation with acidified dichromate ( Cr₂O₇²⁻ / H^+ ) to form p-benzoq