Q. In the manufacture of ammonia by Haber’s process, $N_{2}(g) + 3H_{2} \rightleftharpoons 2NH_{3}(g) + 92.3\ kJ$ Which of the following condition is unfavourable?

A) Increasing the temperature
B) Increasing the pressure
C) Reducing the temperature
D) Removing ammonia as it is formed
Explanation

(a)
$N_{2}(g) + 3H_{2}(g) \rightleftharpoons 3NH_{3}(g) + 92.3\ kJ$
According to Le-Chatelier’s principle, the favourable conditions for the reaction are
Low temperature (as the reaction is exothermic)
High pressure (volume is decreasing)
Constant removal of ammonia gas as it is formed.

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.

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