The product $(C)$ of the reaction is:

Predict the products formed when cyclohexanecarbaldehyde reacts with the following reagents:
$(i)$ $PhMgBr$ and then $H_3O^{+}$
$(ii)$ Tollens' reagent
$(iii)$ Semicarbazide and weak acid
$(iv)$ Excess ethanol and acid
$(v)$ Zinc amalgam and dilute hydrochloric acid

An organic compound $(X)$ with molecular formula $C_3H_6O$ is not readily oxidised. On reduction it gives $(C_3H_8O)$ $(Y)$ which reacts with $HBr$ to give a bromide $(Z)$ which is converted to a Grignard reagent. This Grignard reagent on reaction with $(X)$ followed by hydrolysis gives $2,3-$dimethylbutan$-2-$ol. Compounds $(X)$,$(Y)$ and $(Z)$ respectively are $:$

Carbonyl compounds can generally be converted to hydrocarbons by

Write the structures of the products of the following reactions:
$(i)$ $CH_3-CH=CH_2 \xrightarrow{H_2O/H^+}$
$(ii)$ (See image)
$(iii)$ $CH_3-CH_2-CH(CH_3)-CHO \xrightarrow{NaBH_4}$

Identify the major product of the following reaction: