KCET · Chemistry · Aldehydes and Ketones

The reaction quotient ' \( Q_{C}{ }^{\prime} \) is useful in predicting the direction of the reaction. Which of the
following is incorrect?

A If \( Q_{C}>K_{C} \), the reverse reaction isfavoured
B If \( Q_{C} < K_{C} \), the forward reaction is favoured
C If \( Q_{C}=K_{C} \), forward reaction is favoured
D If \( Q_{C}>K_{C} \), forward reaction is favoured

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Answer & Solution

Correct Answer

(D) If \( Q_{C}>K_{C} \), forward reaction is favoured

Step-by-step Solution

Detailed explanation

\(Q_{C}>K_{C}\), reverse reaction is favored. The product concentration is more than
the equilibrium concentration. The reactant concentration is less than the equilibrium concentration.
If \(Q_{C} < K_{C}\) forward reaction is favored.
If \(Q_{C}=K_{C}\) the reaction is at equilibrium that is dynamic. Both forward and
reverse reactions continue to occur.
Hence, the correct options are \(C\) and \(D\)

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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The reaction quotient ' \( Q_{C}{ }^{\prime} \) is useful in predicting the direction of the reaction. Which of thefollowing is incorrect?

Step-by-step Solution

The reaction quotient ' \( Q_{C}{ }^{\prime} \) is useful in predicting the direction of the reaction. Which of the
following is incorrect?