Reduction of nitroalkanes yields

The compound $A$ when treated with $HNO_3$ (in presence of $H_2SO_4$) gives compound $B$,which is then reduced with $Sn$ and $HCl$ to aniline. The compound $A$ is

Gabriel phthalimide synthesis is used in the preparation of primary amines from phthalimide. Which of the following reagents is not used during the process?

The conversion of propan$-1-$ol to $n-$butylamine involves the sequential addition of reagents. The correct sequential order of reagents is:

For the following compounds,choose the incorrect option?
$CH_3-NH_2 \, \, (P)$
$Ph-NH_2 \, \, (Q)$

What is the number of moles of hydrogen atoms needed to obtain one mole of ethanamine from acetamide using $LiAlH_4 / \text{ether}$ as a reducing agent?