Question

56 g of nitrogen and 8 g hydrogen gas heated in a closed vessel. At equilibrium, 34 g of ammonia are present. The equilibrium number of moles of nitrogen, hydrogen and ammonia are, respectively:

(A) 1, 1, 2 (B) 1, 2, 2 (C) 2, 1, 1 (D) 2, 2, 1

Answer 1

Correct option (A) 1, 1, 2

Explanation:

According to Eq. (1) 2 moles of ammonia are present and to produce 2 moles of NH₃ , we need 1 mole of N₂ and 3 moles of H₂ , hence, 2 – 1 = 1 mole of N₂ and 4 – 3 = 1 mole of H₂ are present at equilibrium in vessel.