The product $(A)$ of the given reaction is:

In acid medium,nitrobenzene is reduced to aniline as shown in the reaction:
$C_6H_5-NO_2 + 6[H] \to C_6H_5-NH_2 + 2H_2O$
The reducing agent used in this reaction is $......$.

Identify the product in the reaction: $CH_3NO_2 \xrightarrow{Sn/HCl} (?)$

In a set of reactions,$m$-bromobenzoic acid gave a product $D$. Identify the product $D$.
$m$-Bromobenzoic acid $\xrightarrow{SOCl_2} B$ $\xrightarrow{NH_3} C$ $\xrightarrow{Br_2/NaOH} D$

Gabriel phthalimide synthesis is used for the preparation of which of the following?

In the reaction sequence $CH_3CONH_2$ $\xrightarrow{?} CH_3CN$ $\xrightarrow{\text{reduction}} CH_3CH_2NH_2$,which dehydrating agent is used in the first step?