Question

Give the chemical equation(s) to prove that NH₃ contains nitrogen and hydrogen.

Answer 1

\[\ce{N2 + 3H2 <=>[Fe/Mo][450-500°C]2NH3 + Heat}\]

This reaction is reversible and exothermic. From the reaction, it is proved that ammonia contains nitrogen and hydrogen.

Also,

\[\ce{4NH3 + 3O2 ->[Heat]2N2_{(g)} ↑ + 6H2O_{(g)}↑}\]

Ammonia burns with a yellowish flame. It produces water vapour and nitrogen. This experiment shows that ammonia contains nitrogen and hydrogen.

Answer 2

When an electric spark is passed through NH₃ gas, it is dissociated into nitrogen and hydrogen.

\[\ce{2NH3 <=> N2 + 3H2}\]

This evidence proves that ammonia gas contains nitrogen and hydrogen.