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Friday, 9 October

JEE Main 2024 · ChemistryMultiple choiceOtherMediumConceptual

JEE Main 8 April 2024, Shift 1, Chemistry Q69

Question 69 of 90 in this shift, Chemistry question 9 of 30, Section A.

Iron (III) catalyses the reaction between iodide and persulphate ions, in which A. Fe3+\mathrm{Fe^{3+}} oxidises the iodide ion B. Fe3+\mathrm{Fe^{3+}} oxidises the persulphate ion C. Fe2+\mathrm{Fe^{2+}} reduces the iodide ion D. Fe2+\mathrm{Fe^{2+}} reduces the persulphate ion Choose the most appropriate answer from the options given below:
  1. (1)A only
  2. (2)B only
  3. (3)A and D onlyOfficial answer
  4. (4)B and C only

Official answer

Option 3

NTA final key.

Chapter
Chemical Kinetics
Topic
d-Block Elements
Idea tested
Mechanisms of Catalytic Activity

Same idea in other shifts

Asked 2× in all
  1. 8 Apr 2026, Shift 2 · Q61Given below are two statements for catalytic properties of transition metals. Statement I : First row transition metals which act as…EasyTwo statements

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.