KCET · Chemistry · Aldehydes and Ketones

Which is the most suitable reagent for the following conversion ?

A Tollen's reagent
B Benzoyl peroxide
C \(\mathrm{I}_{2}\) and \(\mathrm{NaOH}\) solution with subsequent acidification
D Sn and \(\mathrm{NaOH}\) solution

Verified Solution

Answer & Solution

Correct Answer

(C) \(\mathrm{I}_{2}\) and \(\mathrm{NaOH}\) solution with subsequent acidification

Step-by-step Solution

Detailed explanation

In the given reaction \(-\mathrm{COCH}_{3}\) group gets oxidised to \(-\mathrm{COOH}\) without affecting the double bond. This could occur when we use \(\mathrm{I}_{2}\) and \(\mathrm{NaOH}\) solution with subsequent acidification. This reaction is known as iodoform reaction. The overall reaction is as follows

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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