$$ \text { The chemical reaction is given below. } $$

IIT-JEE 2006 Chemistry - Hydrocarbons Question 2 English Explanation 1 $$ \text { It is a two step reaction: } $$

Step 1: Friedel Craft Alkylation

The product is P is formed by reaction between benzene and 1-chloropropane in presence of anhydrous $\mathrm{AlCl}_3$.

IIT-JEE 2006 Chemistry - Hydrocarbons Question 2 English Explanation 2 Hence, product $P$ is cumene.

Step 2: Cumene Hydroperoxide Rearrangement

The second step is oxidation of cumene to form Cumene hydroperoxide.

IIT-JEE 2006 Chemistry - Hydrocarbons Question 2 English Explanation 3 The cumene hydroperoxide on acidic hydrolysis produces phenol and acetone.

On hydrolysis cumene hydroperoxide rearranges to give phenol and acetone as final products.

Hence, the product $P$ is isopropyl benzene and Q is acetone with chemical formula $\mathrm{CH}_3 \mathrm{COCH}_3$.

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