Magnesium powder burns in air to give :
Show Hint
- \(\mathrm{MgO}\) and \(\mathrm{Mg_3N_2}\)
- \(\mathrm{MgO}\) only
- \(\mathrm{Mg(NO_3)_2}\) and \(\mathrm{Mg_3N_2}\)
- \(\mathrm{MgO}\) and \(\mathrm{Mg(NO_3)_2}\)
The Correct Option is A
Solution and Explanation
With oxygen: \(2\mathrm{Mg} + \mathrm{O_2} \rightarrow 2\mathrm{MgO}\).
With nitrogen of air (Mg reacts directly with \(\mathrm{N_2}\) at high temperature): \(3\mathrm{Mg} + \mathrm{N_2} \rightarrow \mathrm{Mg_3N_2}\).
Nitrates are not formed by burning a metal in air, so \(\mathrm{Mg(NO_3)_2}\) is ruled out and the product is a mixture of oxide and nitride.
Answer: (1) MgO and Mg3N2
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