Which one of the following statements is not correct?

Question

For the reaction \( \text{N}_2(g) + 3 \, \text{H_2(g) \rightleftharpoons 2 \, \text{NH}_3(g) \), the equilibrium constant \( K_c \) at a certain temperature is \( 0.5 \). If the initial concentrations of \( \text{N}_2 \), \( \text{H}_2 \), and \( \text{NH}_3 \) are \( 1.0 \, \text{mol/L} \), \( 1.0 \, \text{mol/L} \), and \( 0 \, \text{mol/L} \) respectively, calculate the equilibrium concentrations of all species.}

Answer 1

To determine which statement is not correct, let's analyze each option related to catalysis and equilibrium concepts:

Catalyst does not initiate any reaction: This statement is correct. A catalyst speeds up a reaction without initiating it. It provides an alternative pathway with a lower activation energy but does not start the reaction on its own.
The value of the equilibrium constant is changed in the presence of a catalyst in the reaction at equilibrium: This statement is incorrect. A catalyst does not alter the position of equilibrium or the value of the equilibrium constant. It only accelerates the rate at which equilibrium is reached by equally speeding up the forward and reverse reactions.
Enzymes catalyse mainly biochemical reactions: This statement is correct. Enzymes are biological catalysts that facilitate and accelerate biochemical reactions in living organisms.
Coenzymes increase the catalytic activity of an enzyme: This statement is correct. Coenzymes are organic non-protein molecules that bind to enzymes and assist in the catalysis of reactions by enhancing the enzyme's function.

Based on the analysis above, the correct answer is that "The value of the equilibrium constant is changed in the presence of a catalyst in the reaction at equilibrium" is the statement that is not correct.

Answer 2

To determine which statement is not correct, let's analyze each option related to catalysis and equilibrium concepts:

Catalyst does not initiate any reaction: This statement is correct. A catalyst speeds up a reaction without initiating it. It provides an alternative pathway with a lower activation energy but does not start the reaction on its own.
The value of the equilibrium constant is changed in the presence of a catalyst in the reaction at equilibrium: This statement is incorrect. A catalyst does not alter the position of equilibrium or the value of the equilibrium constant. It only accelerates the rate at which equilibrium is reached by equally speeding up the forward and reverse reactions.
Enzymes catalyse mainly biochemical reactions: This statement is correct. Enzymes are biological catalysts that facilitate and accelerate biochemical reactions in living organisms.
Coenzymes increase the catalytic activity of an enzyme: This statement is correct. Coenzymes are organic non-protein molecules that bind to enzymes and assist in the catalysis of reactions by enhancing the enzyme's function.

Based on the analysis above, the correct answer is that "The value of the equilibrium constant is changed in the presence of a catalyst in the reaction at equilibrium" is the statement that is not correct.

Which one of the following statements is not correct?

The Correct Option is B

Solution and Explanation

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