NEET ChemistryNCERT Class 12Organic Compounds Containing Oxygen

Aldehydes, Ketones and Carboxylic Acids: NEET questions with solutions

NEET tests nucleophilic addition reactivity, aldol versus Cannizzaro, Tollens' and Fehling's tests, Clemmensen and Wolff-Kishner reductions, the iodoform test and the acidity order of substituted carboxylic acids. Marks are lost on needing an α-hydrogen for aldol, on which compounds give the iodoform test, and on how distance changes the inductive effect.

Revise first: NCERT notes for Aldehydes, Ketones and Carboxylic Acids

Questions

10 questions · answers after you pick

1Which compound is the most reactive towards nucleophilic addition to the carbonyl group?Nucleophilic additionEasySingle correct 2Which compound gives a silver mirror with Tollens' reagent?Oxidation and testsEasySingle correct 3Acetophenone (C₆H₅COCH₃) is heated with zinc amalgam and concentrated HCl. What forms?Reduction of carbonyl compoundsEasySingle correct 4Which aldehyde does NOT undergo aldol condensation with dilute NaOH, but undergoes Cannizzaro reaction with concentrated NaOH?Reactions due to α-hydrogenMediumSingle correct 5Which compound gives a yellow precipitate when warmed with iodine and sodium hydroxide?Oxidation and testsMediumSingle correct 6Which acid is the strongest?Acidity of carboxylic acidsMediumSingle correct 7Carboxylic acids with α-hydrogens can be halogenated using red phosphorus. Judge the Assertion (A) and the Reason (R) below.Reactions of carboxylic acidsMediumAssertion–Reason 8Aldehydes and ketones react with many nucleophiles. Which of the statements below are correct?Nucleophilic additionMediumStatement based 9Each conversion in List I needs a specific reagent or set of conditions to make an aldehyde or ketone. Match each conversion with the…Preparation of aldehydes and ketonesHardMatch the following 10A mixture of methanal and benzaldehyde is heated with concentrated NaOH. What are the main products?Cannizzaro reactionHardSingle correct

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