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Friday, 9 October

JEE Main 2026 · ChemistryMultiple choiceOtherEasyApplication

JEE Main 5 April 2026, Shift 1, Chemistry Q67

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

Consider compounds A, B and C with following structural formulae A = CH3−CH2−CH2−CH2−CH2−OH\mathrm{CH_3-CH_2-CH_2-CH_2-CH_2-OH} B = CH2=CH−CH2−CH2−CH3\mathrm{CH_2=CH-CH_2-CH_2-CH_3} C = HO−CH2−CH2−CH(OH)−CH3\mathrm{HO-CH_2-CH_2-CH(OH)-CH_3} For the conversion of B from A, reagent (D) required is ________ and structural formula of product (E) obtained when C undergoes same reaction using excess reagent (D) is ________.

The figure, in words

Each option is a two-column table with headings D (reagent) and E (product structure).
  1. (1)D: Conc. H2SO4\mathrm{H_2SO_4}; E: CH2=CH−CH(OH)CH3\mathrm{CH_2=CH-CH(OH)CH_3}
  2. (2)D: PCC; E: HO−CH2−CH2−CH=CH2\mathrm{HO-CH_2-CH_2-CH=CH_2}
  3. (3)D: PCC; E: CH2=CH−CH=CH2\mathrm{CH_2=CH-CH=CH_2}
  4. (4)D: Conc. H2SO4\mathrm{H_2SO_4} or H3PO4\mathrm{H_3PO_4}; E: CH2=CH−CH=CH2\mathrm{CH_2=CH-CH=CH_2}Official answer

Official answer

Option 4

NTA final key.

Chapter
Alcohols, Phenols and Ethers
Topic
Alcohols and Phenols
Idea tested
Alcohol Dehydration Ease

Same idea in other shifts

Asked 2× in all
  1. 8 Apr 2024, Shift 1 · Q78Identify the major products A and B respectively in the following set of reactions. [figure: 1-methylcyclohexan-1-ol (ring carbon bearing…MediumDiagram 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.