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Friday, 9 October

JEE Main 2025 · ChemistryMultiple choiceOtherEasyApplication

JEE Main 4 April 2025, Shift 2, Chemistry Q67

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

Which among the following compounds give yellow solid when reacted with NaOI/NaOH ? (A) CH3−CH(OH)−C2H5\mathrm{CH_3-CH(OH)-C_2H_5} (B) CH3−CH2−CH2−OH\mathrm{CH_3-CH_2-CH_2-OH} (C) CH3−C(=O)−C2H5\mathrm{CH_3-C(=O)-C_2H_5} (D) CH3−C(=O)−OH\mathrm{CH_3-C(=O)-OH} (E) CH3−CH2−C(=O)−H\mathrm{CH_3-CH_2-C(=O)-H} Choose the correct answer from the options given below :
  1. (1)(A) and (C) OnlyOfficial answer
  2. (2)(A), (C) and (D) Only
  3. (3)(B), (C) and (E) Only
  4. (4)(C) and (D) Only

Official answer

Option 1

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 4× in all
  1. 3 Apr 2025, Shift 1 · Q68Number of molecules from below which cannot give iodoform reaction is: Ethanol, Isopropyl alcohol, Bromoacetone, 2−-Butanol,…MediumSingle correct
  2. 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
  3. 29 Jun 2022, Shift 1 · Q90C6H12O6→ZymaseA→ΔNaOIB+CHI3\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 42 of the 174 JEE Main shifts held from 2017 to 2026.