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Statement-1 A catalyst does not influenc...

Statement-1 A catalyst does not influence the values equilibrium constant.
and
Statement-2 : Catalysts influence the rate of both forward and backward reactions equally.

A

Statement -1 is true, Statement -2 is true , Statement-2 is correct explanation for Statement -3

B

Statement-1 is True, Statement-2 is true, Statement-2 is not a correct explanation for Statement -3

C

Statement-1 is true, Statement -2 is false

D

Statement -1 is false, Statement -2 is true

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the given statements about catalysts and their effect on chemical equilibrium, let's break down the solution step by step. ### Step 1: Understanding the Role of a Catalyst A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process. It achieves this by providing an alternative reaction pathway with a lower activation energy. **Hint:** Remember that catalysts do not alter the reactants or products; they only affect the speed of the reaction. ### Step 2: Equilibrium Constant Definition The equilibrium constant (K) for a reaction at equilibrium is defined as the ratio of the concentrations of products to the concentrations of reactants, each raised to the power of their coefficients in the balanced equation. **Hint:** Equilibrium constants are determined by the concentrations of reactants and products at equilibrium, not by how quickly equilibrium is reached. ### Step 3: Effect of a Catalyst on Reaction Rates When a catalyst is added to a reaction, it increases the rates of both the forward and backward reactions equally. This means that while the rates of the reactions increase, the ratio of the rates remains the same. **Hint:** A catalyst speeds up both directions of a reversible reaction equally, leading to no change in the equilibrium position. ### Step 4: Analyzing Statement 1 Statement 1 claims that a catalyst does not influence the value of the equilibrium constant. This is true because the equilibrium constant is dependent on the temperature and the nature of the reactants and products, not on the presence of a catalyst. **Hint:** Think about the definition of K; it is a ratio of concentrations at equilibrium, which remains unchanged by the catalyst. ### Step 5: Analyzing Statement 2 Statement 2 states that a catalyst influences the rate of both forward and backward reactions equally. This statement is also true, as we established that a catalyst accelerates both reactions in the same proportion. **Hint:** Consider how a catalyst affects the activation energy for both directions of the reaction. ### Step 6: Conclusion Both statements are true, and Statement 2 correctly explains Statement 1. Therefore, the correct answer is that both statements are true, and Statement 2 is the correct explanation for Statement 1. **Final Answer:** Both Statement 1 and Statement 2 are true, and Statement 2 is the correct explanation for Statement 1.
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Assertion (A) : A catalyst does not influences the values of equilibrium constant Reason (R) : Catalyst influences the rate of both forward and backward reactions equally.

How does a catalyst influence the equilibrium constant ?

Statement-1 : The catalyst does not affect the equilibrium constant. Statement-2 : Because for the catalysed reaction and uncatalysed reaction Delta H remains same and equilibrium constant depends on Delta H .

In an equilibrium , the catalyst increases th rate of the forward reaction while decreases the rate of the backward reaction.

A : A catalyst does not alter the equilibrium constant of a reaction R : A catalyst does not alter the position of chemical equilibrium .