Question

One mole of magnesium nitride on reaction with excess of water gives:

• A. one mole of ammonia
• B. one mole of nitric acid
• C. two moles of ammonia
• D. two moles of nitric acid

Answer 1

The correct option is C two moles of ammonia

$M{g}_3{N}_2+6H_{2}O\to 3Mg(OH{)}_2+2N{H}_3$

From the reaction:

1 mole of $Mg$ reacts with 6 moles of $H_{2}O$ to form 2 moles of $N{H}_3$