Chlorine reacts with ethanol to give

Which one of the following reactions will not result in the formation of a carbon-carbon bond?

Identify $P$ and $Q$ respectively of the following reaction.

In the given reaction,identify $(X)$ and $(Y)$:

An organic compound neither reacts with neutral ferric chloride solution nor with Fehling solution. It,however,reacts with Grignard reagent and gives a positive iodoform test. The compound is:

Assertion : Benzaldehyde is more reactive than ethanol towards nucleophilic attack.
Reason : The overall effect of $-I$ and $+R$ effect of phenyl group decreases the electron density on the carbon atom of $>C=O$ group in benzaldehyde.