$CH_3-CH_2-C(=O)-OCH_3 + 2CH_3MgBr \to A \xrightarrow[\Delta]{H^+} B$
The product $B$ is:

The strongest acid amongst the following compounds is:

Which of the following reactions of ethanol produces a fruity smell?

$Ph-CO_2H$ $\xrightarrow{SOCl_2} A$ $\xrightarrow{Me_2NH} B$ $\xrightarrow{(C)} Ph-CHO$. The unknown reagent $(C)$ is:

Which of the following will not produce acetamide upon reaction with ammonia?

$CH_2=CH-CO-OCH_3$ (methyl acrylate,bp $81^\circ C$) + $CH_3-CH_2-CH_2-CH_2-OH$ (n-butyl alcohol,bp $117^\circ C$) $\xrightarrow{TsOH, \Delta} (A)$ (bp $145^\circ C$) + $CH_3OH$ (bp $65^\circ C$). Product $(A)$ of the above reaction is: