$1$-Phenylethanol can be prepared by the reaction of benzaldehyde with the product obtained in the reaction between

$CH_3-CH(OH)-CN$ is

$A$ man has been asked to synthesize the molecule shown in the image. He thought of preparing the molecule using an aldol condensation reaction. He found a few cyclic alkenes in his laboratory. He thought of performing an ozonolysis reaction on an alkene to produce a dicarbonyl compound,followed by an aldol reaction to prepare "$x$". Predict the suitable alkene that can lead to the formation of "$x$".

Which of the following reactions give benzophenone?

Identify the product obtained when a Grignard reagent $(R'MgX)$ reacts with an alkyl cyanide $(RCN)$ followed by acid hydrolysis.

Benzyl chloride when oxidised by $Pb(NO_3)_2$ gives