Q. For the reversible reaction : $N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g)$ + 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 concentration of $N_2$(g) and $H_2$(g)
D) By increasing pressure and decreasing temperature
Explanation
[Solution] Fewer gas moles on the product side and an exothermic forward reaction: high pressure and low temperature favour it (Le Chatelier). Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.