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Question
Give the chemical equation(s) to prove that \[\ce{NH3}\] contains nitrogen and hydrogen.
Solution 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 shows that ammonia contains nitrogen and hydrogen.
Solution 2
When an electric spark is passed through \[\ce{NH3}\] gas, it is dissociated into nitrogen and hydrogen.
\[\ce{2NH3 <=> N2 + 3H2}\]
This proves that ammonia gas contains nitrogen and hydrogen.
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