Question

Ammonia is manufactured by:
\[ \text{N}_2(g) + 3\text{H}_2(g) \rightleftharpoons 2\text{NH}_3(g) \quad \Delta H_f^\circ = -46.1 \, \text{kJ/mol} \] The various steps involved are:
(A) Condensation of mixture of gases
(B) Passing the gaseous mixture over catalyst
(C) Compression of the mixture of gases
(D) Recirculation of the gaseous mixture
Choose the correct answer from the options given below:

• A. (C), (B), (A), (D)
• B. (B), (C), (D), (A)
• C. (A), (D), (C), (B)
• D. (B), (A), (D), (C)

Hint:

The Haber process for ammonia synthesis requires a specific order of steps involving compression, catalysis, condensation, and recirculation to achieve optimal efficiency.

Answer 1

The Correct Option is B

Ammonia is synthesized using the Haber process, which involves the following steps:
1. Compression of the mixture of gases (C): The nitrogen and hydrogen gases are compressed to high pressures to increase the reaction rate.
2. Passing the gaseous mixture over a catalyst (B): The compressed gases are passed over a catalyst, typically iron, to speed up the reaction.
3. Condensation of mixture of gases (A): The ammonia gas is cooled and condensed into a liquid.
4. Recirculation of the gaseous mixture (D): Unreacted nitrogen and hydrogen gases are recirculated back into the system for further reaction.
Thus, the correct order is: (B), (C), (D), (A).