$A$ primary amine can be converted to an alcohol by the action of

Which of the following is the strongest base?

When a concentrated solution of sulphanilic acid and $1-$naphthylamine is treated with nitrous acid $(273 \ K)$ and acidified with acetic acid,the mass $(g)$ of $0.1 \ mole$ of product formed is : (Given molar mass in $g \ mol^{-1} H: 1, C: 12, N: 14, O: 16, S: 32$)

Identify the strongest base from the given compounds.

How will you carry out the following conversion?
$Aniline \rightarrow m-Bromonitrobenzene$

How many secondary amines are possible with the molecular formula $C_4H_{11}N$?