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Friday, 9 October

JEE Main 2025 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 2 April 2025, Shift 1, Chemistry Q67

Question 67 of 75 in this shift, Chemistry question 17 of 25, Section A.

Consider the following molecules : (p) CH3−CH2−C(=O)−Cl\mathrm{CH_3-CH_2-C(=O)-Cl} (q) CH3−CH2−C(=O)−O−C(=O)−CH3\mathrm{CH_3-CH_2-C(=O)-O-C(=O)-CH_3} (r) CH3−CH2−C(=O)−O−CH2−CH3\mathrm{CH_3-CH_2-C(=O)-O-CH_2-CH_3} (s) CH3−CH2−C(=O)−NH2\mathrm{CH_3-CH_2-C(=O)-NH_2} The correct order of rate of hydrolysis is :

The figure, in words

Four structural formulas (p) CH3CH2COCl (acid chloride), (q) CH3CH2CO-O-COCH3 (mixed anhydride), (r) CH3CH2COOCH2CH3 (ester), (s) CH3CH2CONH2 (amide), drawn with C=O above the carbonyl carbon.
  1. (1)q > p > r > s
  2. (2)r > q > p > s
  3. (3)p > r > q > s
  4. (4)p > q > r > sOfficial answer

Official answer

Option 4

NTA final key.

Chapter
Aldehydes, Ketones and Carboxylic Acids
Topic
Carboxylic Acids and Derivatives
Idea tested
Nucleophilic Acyl Substitution

Same idea in other shifts

Asked 2× in all
  1. 8 Apr 2026, Shift 2 · Q67Consider the following reaction. [figure: N-substituted 2-piperidone (six-membered lactam, C=O adjacent to ring N) with N bonded to…HardDiagram basedHas a figure

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.