Question

12 g of Mg (at. wt. 24) on reacting completely with an acid would give H₂, the volume of which at STP would be

(a) 6.4 litres

(b) 11.2 litres

(c) 22.4 litres

(d) 44.8 litres

Answer 1

Correct option is (b) 11.2 litres

Mg + H₂SO₄ → MgSO₄ + H₂

Volume of H₂ at STP = \(\frac{22.4 \times 12}{24}\) = 11.2 l