Question

Compound A is :

• A. Ammonium nitrate
• B. Ammonium dichromate
• C. Ammonium sulphide
• D. Ammonium Nitrite

Answer 1

The correct option is A Ammonium nitrate

Compound A is $ammoniumnitrate$ $N{H}_{4}N{O}_3$
On thermal decomposition, it gives a mixture $N_{2}O+H_{2}O$
$N{H}_{4}N{O}_3\to N_{2}O+2H_{2}O$
On heating with $causticsoda$, it gives a mixture $NaN{O}_3+N{H}_3+H_{2}O$
$N{H}_{4}N{O}_3+NaOH\to NaN{O}_3+N{H}_3+H_{2}O$
This mixture on reduction with $Zn$ powder gives $ammonia$ gas (B).
When $ammoniumnitrate$ is heated with excess $causticsoda$, it gives $ammonia$ and other products. $Ammonia$ reacts with $HCl$ to form white fumes of $ammoniumchloride$
$N{H}_3+HCl\to N{H}_{4}Cl$