A metal is burnt in air and the ash on moiste | vedclass

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(C) When a metal is burnt in air,it reacts with both $O_2$ and $N_2$ to form its oxide and nitride respectively.For magnesium $(Mg)$,the reactions are

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$Mg$

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(C) When a metal is burnt in air,it reacts with both $O_2$ and $N_2$ to form its oxide and nitride respectively.For magnesium $(Mg)$,the reactions are:$3 Mg + O_2 \rightarrow 2 MgO$$3 Mg + N_2 \rightarrow Mg_3N_2$The resulting ash contains $Mg_3N_2$. Upon moistening,the magnesium nitride undergoes hydrolysis to release ammonia gas:$Mg_3N_2 + 6 H_2O \rightarrow 3 Mg(OH)_2 + 2 NH_3 \uparrow$The smell of $NH_3$ confirms the presence of the nitride.

$A$ metal is burnt in air and the ash on moistening smells of $NH_3$. The metal is

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