NEET · Chemistry · STD 11 - 6.1. Equilibrium - 1 (chemical Equilibrium)

Which one of the following conditions will favour maximum formation of the product in the reaction \(\mathrm{A}_{2}(\mathrm{g})+\mathrm{B}_{2}(\mathrm{g}) \rightleftharpoons \mathrm{X}_{2}(\mathrm{g}) \Delta_{r} \mathrm{H}=-\mathrm{X} \mathrm{kJ} ?\)

A Low temperature and high pressure
B Low temperature and low pressure
C High temperature and high pressure
D High temperature and low pressure

Verified Solution

Answer & Solution

Correct Answer

(A) Low temperature and high pressure

Step-by-step Solution

Detailed explanation

For reaction \(\Delta \mathrm{H}=-\mathrm{ve}\) and \(\Delta \mathrm{n}_{\mathrm{g}}=-\mathrm{ve}\) \(\therefore\) High \(\mathrm{P}\), Low \(T\), favour product formation.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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