Vapours of an alcohol 'C' on passing over heated copper produce compound 'D'. 'D' on reaction with `CH_(3)MgCl` followed by hydrolysis produces 2-methylbutan-2-ol. Write the names and structures of compound 'C' and 'D'.

Explanation

To solve the problem, we need to identify the compounds 'C' and 'D' based on the given reactions.

### Step 1: Identify Compound 'D'
The question states that vapors of an alcohol 'C' on passing over heated copper produce compound 'D'. When alcohols are passed over heated copper, they undergo dehydrogenation to form aldehydes or ketones.

Since the final product after reacting with `CH₃MgCl` (a Grignard reagent) followed by hydrolysis is 2-methylbutan-2-ol, we can deduce that compound 'D' must be a ketone. The Grignard reagent `CH₃MgCl` will react with a ketone to form a tertiary alcohol.

### Step 2: Determine the Structure of Compound 'D'
...