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In the reaction A (g) + B (g)hArr C (g),...

In the reaction A (g) + B (g)`hArr` C (g), the backward reaction is favoured by (A) Increase in pressure

A

Decrease of pressure

B

Increase of pressure

C

Either of (1) or (2)

D

Neither of (1) or (2)

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the reaction \( A(g) + B(g) \rightleftharpoons C(g) \) and the factors that favor the backward reaction, we can follow these steps: ### Step 1: Understand the Reaction The reaction involves two moles of gas on the reactant side (A and B) and one mole of gas on the product side (C). ### Step 2: Identify Moles of Reactants and Products - Reactants: 1 mole of A + 1 mole of B = 2 moles - Products: 1 mole of C = 1 mole ### Step 3: Apply Le Chatelier's Principle Le Chatelier's principle states that if an external change is applied to a system at equilibrium, the system will adjust to counteract that change and restore a new equilibrium. ### Step 4: Analyze the Effect of Pressure - If the pressure is increased, the equilibrium will shift towards the side with fewer moles of gas. In this case, that would be the product side (C). - Conversely, if the pressure is decreased, the equilibrium will shift towards the side with more moles of gas, which is the reactant side (A + B). ### Step 5: Conclusion Since the question asks for the condition that favors the backward reaction (the formation of A and B from C), we conclude that a decrease in pressure will favor the backward reaction. Thus, the answer is: **The backward reaction is favored by a decrease in pressure.**
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