Question

For the reversible reaction,

N_2(g) + 3H_2(g) ⇋ 2NH_3(g) + heat

The equilibrium shifts in forward direction

(a) by increasing the concentration of NH_3(g)

(b) by decreasing the pressure

(c) by decreasing the concentrations of N_2(g) and H_2(g)

(d) by increasing pressure and decreasing temperature.

Answer 1

The correct option is: (d) by increasing pressure and decreasing temperature.

Explanation:

As the forward reaction is exothermic and leads to lowering of pressure (produces lesser number of gaseous moles) hence, according to Le Chatelier's principle, at high pressure and low temperature, the given reversible reaction will shift in forward direction to form more product.