Question

56 g of nitrogen and 8 g hydrogen gas are 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, 2, 2
• B. 2, 2, 1
• C. 1, 1, 2
• D. 2, 1, 2

Answer 1

The correct option is C 1, 1, 2

$N_2+3H_2\rightleftharpoons 2N{H}_3$
$\underset{att=0}{}\underset{2mole}{}\underset{4mole}{}\underset{0mole}{}$

$at{t}_{eql{b}^m}2-14-32\left(inmole\right)$

According to eq. (i) 2 mole of ammonia are present and to produce 2 mole of $N{H}_3,$ we need 1 mole of $N_2$ and 3 mole of $H_2$ hence 2 - 1 = 1 mole of $N_2$ and 4 - 3 = 1 mole of $H_2$ are present at equilibrium in vessel.