JEE Main · 2018 · 08 Apr 2018 · Offline · p-Block Elements

The compound that does not produce nitrogen gas by the thermal decomposition is :

(A) $(NH_{4})_{2} SO_{4}$ ✓ Correct
(B) $Ba (N_{3})_{2}$
(C) $(NH_{4})_{2} Cr_{2} O_{7}$
(D) $NH_{4} NO_{2}$

Answer: (A)

Solution

Heating ammonium sulfate drives off ammonia and leaves sulfuric acid, with no nitrogen gas formed, whereas barium azide gives barium and

N X_{2}

, ammonium dichromate gives

N X_{2}

with

Cr X_{2} O X_{3}

and water, and ammonium nitrite gives

N X_{2}

and water. The compound that fails to release nitrogen gas is ammonium sulfate.

JEE Main · 2018 · 08 Apr 2018 · Offline · Single correct option

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