JEE Main 2023 · ChemistryNumerical answerNumerical valueMediumApplication

JEE Main 6 April 2023, Shift 2, Chemistry Q89

Question 89 of 90 in this shift, Chemistry question 29 of 30, Section B.

Among the following, the number of compounds which will give positive iodoform reaction is ______________. (a) 1-Phenylbutan-2-one (b) 2-Methylbutan-2-ol (c) 3-Methylbutan-2-ol (d) 1-Phenylethanol (e) 3,3-dimethylbutan-2-one (f) 1-Phenylpropan-2-ol

Official answer

NTA final key.

Chapter: Aldehydes, Ketones and Carboxylic Acids
Topic: Alcohols and Phenols
Idea tested: Iodoform Test for Specific Alcohols

Same idea in other shifts

Asked 5× in all

3 Apr 2025, Shift 1 · Q68Number of molecules from below which cannot give iodoform reaction is: Ethanol, Isopropyl alcohol, Bromoacetone, 2 $-$ Butanol,…MediumSingle correct
4 Apr 2025, Shift 2 · Q67Which among the following compounds give yellow solid when reacted with NaOI/NaOH ? (A) $\mathrm{CH_3-CH(OH)-C_2H_5}$ (B)…EasyOther
9 Apr 2024, Shift 2 · Q78Which of the following compound can give positive iodoform test when treated with aqueous KOH solution followed by potassium hypoiodite.MediumSingle correctHas a figure
29 Jun 2022, Shift 1 · Q90 $\mathrm{C_6H_{12}O_6 \xrightarrow{Zymase} A \xrightarrow[\Delta]{NaOI} B + CHI_3}$ The number of carbon atoms present in the product B is…EasyNumerical value

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.