Acetophenone is prepared from

An organic compound $X$ gives a red precipitate on heating with Fehling's solution. Which one of the following reactions yields $X$ as a major product?

The reagent used for the Gatterman-Koch formylation of arene is

Identify the product obtained when benzonitrile is reduced by stannous chloride $(SnCl_2)$ in the presence of hydrochloric acid $(HCl)$,followed by acid hydrolysis.

What are $X$ and $Y$ in the following reactions?

Which of the following reactions will not produce acetaldehyde?