Consider the equilibrium ${N_2}_{(g)} + 3{H_2}_{(g)} \rightleftharpoons 2N{H_3}_{(g)}$,$\Delta H = -93.6 \ kJ$. The maximum yield of ammonia is obtained by:

What will be the effect of pressure on the equilibrium reaction $C_{(s)} + H_2O_{(g)} \rightleftharpoons H_{2_{(g)}} + CO_{(g)}$?

Observe the following equilibrium at $T(K)$:
$H_{2(g)} + I_{2(g)} \rightleftharpoons 2HI_{(g)}$
Which one of the following does not disturb the above equilibrium?

Which of the following reactions will be affected by increasing the pressure? Also,mention whether the change will cause the reaction to proceed in the forward or backward direction.
$(i)$ $COCl_{2(g)} \longleftrightarrow CO_{(g)} + Cl_{2(g)}$
$(ii)$ $CH_{4(g)} + 2S_{2(g)} \longleftrightarrow CS_{2(g)} + 2H_2S_{(g)}$
$(iii)$ $CO_{2(g)} + C_{(s)} \longleftrightarrow 2CO_{(g)}$
$(iv)$ $2H_{2(g)} + CO_{(g)} \longleftrightarrow CH_3OH_{(g)}$
$(v)$ $CaCO_{3(s)} \longleftrightarrow CaO_{(s)} + CO_{2(g)}$
$(vi)$ $4NH_{3(g)} + 5O_{2(g)} \longleftrightarrow 4NO_{(g)} + 6H_2O_{(g)}$

In which of the following reactions will an increase in pressure shift the equilibrium in the backward direction?

In which of the following equilibria does a change in the volume of the system not alter the number of moles?