The unsaturated ether on acidic hydrolysis produces carbonyl compounds as shown below. Based on this, predict the solution/reagent that will help to distinguish "P" and "Q" obtained in the reaction.
reagent
Saturated solution
Fehling solution
Lucas reagent
Correct answer:C
Standard Method
Given: Acidic hydrolysis produces two carbonyl compounds, P and Q.
Find: The reagent that distinguishes P and Q.
Step 1: Nature of products. Acidic hydrolysis produces one aldehyde and one ketone.
Step 2: Differentiation. Fehling solution gives a positive test with aldehydes but not with ketones.
Step 3: Conclusion. Therefore, Fehling solution can distinguish between P and Q. The correct option is C.
Choosing reagent is incorrect because it gives a positive test for both aldehydes and ketones. It does not distinguish between the two. Use a reagent that responds differently to aldehydes and ketones.
Assuming saturated solution will always distinguish the products is incorrect because both many aldehydes and many ketones can form bisulfite addition compounds. The better choice here is Fehling solution, which is specific in this context.
Choosing Lucas reagent is incorrect because it is used to classify alcohols, not to distinguish aldehydes from ketones. First identify the functional groups present after hydrolysis, then select the test accordingly.
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