AP EAMCET · Chemistry · Chemical Equilibrium

Which of the following is not a characteristic property of chemical equilibrium ?

A Rate of forward reaction is equal to rate of backward reaction at equilibrium.
B After reaching the chemical equilibrium, the concentrations of reactants and products remain unchanged with time.
C For \(A(g) \rightleftharpoons B(g), K_c\) is \(10^{-2}\). If this reaction is carried out in the presence of catalyst, the value of \(K_c\) decreases
D After reaching the equilibrium, both forward and backward reactions continue to take place

Verified Solution

Answer & Solution

Correct Answer

(C) For \(A(g) \rightleftharpoons B(g), K_c\) is \(10^{-2}\). If this reaction is carried out in the presence of catalyst, the value of \(K_c\) decreases

Step-by-step Solution

Detailed explanation

There will be no effect on equilibrium constant \(\left(K_c\right)\) in presence of catalyst. So, statement (c) is wrong.

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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