NEET UG · Chemistry · Aldehydes, Ketones and Carboxylic Acids

Cross-Aldol Reaction Selectivity

NEET asked Cross-Aldol Reaction Selectivity twice, in 2020 and 2022: 2 of the 1,875 questions in the 10 papers from 2017–2026. It belongs to Aldol Condensation, in Aldehydes, Ketones and Carboxylic Acids (Chemistry). The longest wait between two papers asking it was 2 years.

Updated 2026-10-08

Times asked: 2; in 2017–2026
Papers: 2; of 10
First asked: 2020; last in 2022
Chance next paper: 6%; calibrated historical rate

Questions on this idea, by paper

2017–2026. 2020 and 2022.

How NEET framed it

One-line MCQ is the usual form. Skill tested: concept.

Name the reaction type
Identify product not formed in aldol

Chance asked next paper 6%

Every question

All 2 questions

From the official NEET UG papers, newest first. Open one for the full question, the options and the official answer.

2022 Q 90 Which one of the following is not formed when acetone reacts with 2-pentanone in the presence of dilute NaOH followed by heating ? One-line MCQ \cdot Hard \cdot figure 2020 Q 107 Reaction between benzaldehyde and acetophenone in presence of dilute NaOH is known as : One-line MCQ \cdot Easy

Papers: NEET 2020, NEET 2022.

Same topic

Other ideas in Aldol Condensation

Aldol Condensation has 4 ideas NEET has asked; 1 of them came up in more than one question.

Claisen-Schmidt Condensationonce · 2026
Acetaldehyde Self-Condensation (Crotonaldehyde)once · 2017
Aldol Dehydration to Enonesonce · 2017

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