Reaction of ethyl formate with excess of $CH_3MgI$ followed by hydrolysis gives

Butanal with dilute $NaOH$ gives

Which of the following does not react with $NaHSO_3$ (sodium bisulphite)?

The appropriate reagent for the transformation shown below is:

The value of $x$ in the above reaction is:

Which of the following reactions are incorrect?
$(a)$ $CH_2(COOH)_2 \xrightarrow{\Delta} CH_3COOH + CO_2$
$(b)$ Aniline $\xrightarrow{CH_3Cl/AlCl_3}$ $p$-chloroaniline
$(c)$ Phenol $\xrightarrow{CHCl_3 + aq. NaOH}$ Salicylic acid
$(d)$ $CH_3CHO + NaHSO_3 \rightleftharpoons CH_3CH(OH)SO_3Na$
$(e)$ Benzene $\xrightarrow{CO, HCl, Anhydrous AlCl_3/CuCl}$ Benzaldehyde