jee_main_2026_24_january_evening - Aldehydes, Ketones and Carboxylic Acids Topics

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QUESTION #52 Chemical Reactions of Aldehydes and Ketones
The unsaturated ether on acidic hydrolysis produces carbonyl compounds as shown below:- mathrmCH _ 3 - mathrmCH = mathrmCH - mathrmO - mathrmCH = mathrmCH _ 2 downarrow mathrmH _ 3 mathrmO ^ (+) mathrmCH _ 3 - mathrmCH _ 2 - mathrmCH = mathrmO text and mathrmO = mathrmCH - mathrmCH _ 3 Based on this, predict the solution / reagent that will help to distinguish "P" and "Q" obtained in the following reaction. {{IMG1}}
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QUESTION #64 Chemical Reactions
Given below are two statements : Statement I : Cross aldol condensation between two different aldehydes will always produce four different products. Statement II : When semicarbazide reacts with a mixture of benzaldehyde and acetophenone under optimum pH, it forms a condensation product with acetophenone only. In the light of the above statements, choose the correct answer from the options given below :
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QUESTION #75 Preparation of Carboxylic Acids
Grignard reagent RMgBr(P) reacts with water and forms a gas (Q). One gram of Q occupies 1.4 dm ^3 at STP. (P) on reaction with dry ice in dry ether followed by H_3O^+ forms a compound (Z). 0.1 mole of (Z) will weigh ____ g. (Nearest integer)
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