The statement that is $NOT$ correct is:

When a brown compound of manganese $(A)$ is treated with $HCl$,it gives a gas $(B)$. The gas taken in excess,reacts with $NH_3$ to give an explosive compound $(C)$. Identify compounds $A$,$B$,and $C$.

Why $NH_3$ cannot be dried by $H_2SO_4$,$P_2O_5$,and $CaCl_2$?

$NH_3$ reacts with bleaching powder to give:

Which one of the following is used to remove moisture from ammonia gas?

Determine whether the following statements are True $(T)$ or False $(F)$:
$1.$ Ammonia is produced from a mixture of $SO_2$ and $N_2$.
$2.$ $N_2H_2$ and $N_2H_4$ are formed from a mixture of $N_2/H_2$ in the Haber process.
$3.$ Compounds of $d$ or $f$ block elements are not used as catalysts in the Haber process.