Question

Which of the following when subjected to thermal decomposition will liberate dinitrogen? (i) sodium nitrate (ii) ammonium dichromate (iii) barium azide

• A. i, ii only
• B. ii, iii only
• C. i, iii only
• D. i, ii, iii

Hint:

Compounds containing azide (\( N_3^- \)) or ammonium cation (\( NH_4^+ \)) tend to release nitrogen gas upon decomposition.

Answer 1

The Correct Option is B

Ammonium dichromate (\( (NH_4)_2Cr_2O_7 \)) decomposes to form N\(_2\), Cr\(_2O_3\), and H\(_2\)O. Barium azide (Ba(N\(_3\))\(_2\)) decomposes to give Ba and N\(_2\) gas. Sodium nitrate (NaNO\(_3\)) decomposes into NaNO\(_2\) and O\(_2\), not N\(_2\).