Question

Pure nitrogen is prepared in the laboratory by
heating a mixture of
(a) NH₄OH + NaCl (b) NH₄ NO₃ + NaCl
(c) NH₄ Cl + NaOH (d) NH₄ Cl + NaNO₂.

Answer 1

Answer:

$(d) </p><p>NH_4Cl +NaNO_3</p><p>$

Answer 2

(d) NH₄ Cl + NaNO₂

Explanation:

Nitrogen is prepared in the laboratory by heating a mixture of ammonium chloride and sodium nitrite. Ammonium nitrite is first formed as a result of double decomposition reaction.

 NH₄ Cl + NaNO₂ ---->  NH₄NO₂ + NaCl  

But ammonium nitrite is unstable, so it decomposes immediately to form nitrogen gas.

 NH₄NO₂ ----> N₂ (g) + 2H₂O (l)

Option D is the answer.