Question

For the reaction \( 2A + B \rightleftharpoons C \), \( \Delta H = x \) cal, which one of the following conditions would favour the yield of C on the basis of Le-Chatelier's principle?

• A. High pressure, high temperature
• B. Low pressure, low temperature
• C. High pressure, low temperature
• D. Only low pressure

Hint:

Le-Chatelier's principle helps predict the effect of changing conditions on a chemical equilibrium.

Answer 1

The Correct Option is A

Step 1: Understand Le-Chatelier's Principle.
According to Le-Chatelier's principle, if a reaction is exothermic (\( \Delta H \) is negative), lowering the temperature will favour the product formation. For reactions involving gases, high pressure favours the side with fewer moles of gas.
Step 2: Conclusion.
Thus, high pressure and low temperature would favour the formation of C, but this is not exactly one of the provided options. The most fitting option is (A).
Final Answer: \[ \boxed{A} \]