JEE Main 2024 · ChemistryMultiple choiceSingle correctEasyMulti-step

JEE Main 4 April 2024, Shift 2, Chemistry Q79

Question 79 of 90 in this shift, Chemistry question 19 of 30, Section A.

\mathrm{CH_3-CH_2-CH_2-Br + NaOH \xrightarrow{C_2H_5OH}}

Product 'A' Product A

\xrightarrow{\mathrm{H_2O/H^+}}

Product "B" Product A

\xrightarrow[\mathrm{H_2O/H_2O_2/\overline{O}H}]{\mathrm{Diborane}}

Product "C" Consider the above reactions, identify product B and product C.

(1)B = 2-Propanol C = 1-PropanolOfficial answer
(2)B = 1-Propanol C = 2-Propanol
(3)B = C = 2-Propanol
(4)B = C = 1-Propanol

Official answer

Option 1

NTA final key.

Chapter: Alcohols, Phenols and Ethers
Topic: Alkenes and Alkynes
Idea tested: Hydroboration-Oxidation

Same idea in other shifts

Asked 6× in all

9 Apr 2024, Shift 1 · Q76Identify the product A and product B in the following set of reactions. [figure: $\mathrm{CH_3-CH=CH_2}$ …EasySingle correctHas a figure
10 Apr 2023, Shift 2 · Q75Incorrect method of preparation for alcohols from the following is:EasySingle correct
15 Apr 2023, Shift 1 · Q76The product formed in the following multistep reaction is : $\mathrm{CH_3-CH=CH_2}$ …MediumOtherHas a figure
24 Jun 2022, Shift 2 · Q75Which of the following reagents / reactions will convert 'A' to 'B'?MediumSingle correctHas a figure
8 Jan 2020, Shift 2 · Q45The major product [B] in the following sequence of reactions is :…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. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.