The number of compounds which react with Hinsberg's reagent (benzenesulfonyl chloride) is $ . . . . . . $.

$A$ solution of $NaNO_3$, when treated with a mixture of $Zn$ dust and '$A$' yields ammonia. '$A$' can be

Which amine does not react with Hinsberg reagent?

Which of the following will react with $CHCl_{3} +$ alc. $KOH$?

Identify Hinsberg's reagent from the following.

Given below are two statements:
Statement $I$: All the following compounds react with $p$-toluenesulfonyl chloride:
$C_6H_5NH_2$
$(C_6H_5)_2NH$
$(C_6H_5)_3N$
Statement $II$: Their products in the above reaction are soluble in aqueous $NaOH$.
In the light of the above statements,choose the correct answer from the options given below.