Question

What are the gases released when \(\mathrm{NH_4NO_2}\) and \(\mathrm{NH_4NO_3}\) are heated?

• A. \(\mathrm{N_2}\) and \(\mathrm{H_2O}\)
• B. \(\mathrm{N_2O}\) and \(\mathrm{H_2O}\)
• C. \(\mathrm{NO_2}\) and \(\mathrm{O_2}\)
• D. \(\mathrm{N_2}\) and \(\mathrm{NO_2}\)

Hint:

Thermal decomposition of ammonium nitrite gives nitrogen and water vapor; remember the balanced equation!

Answer 1

The Correct Option is A

- When \(\mathrm{NH_4NO_2}\) (ammonium nitrite) is heated, it decomposes as: \[ \mathrm{NH_4NO_2 \rightarrow N_2 + 2H_2O} \] - Hence, nitrogen gas and water vapor are released. - \(\mathrm{NH_4NO_3}\) (ammonium nitrate), when heated gently, can also decompose to give: \[ \mathrm{NH_4NO_3 \rightarrow N_2O + 2H_2O} \] - But in presence of both salts, \(\mathrm{NH_4NO_2}\) dominates with major gaseous product as \(\mathrm{N_2}\) and \(\mathrm{H_2O}\).