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Friday, 9 October

JEE Main 2022 · ChemistryMultiple choiceOtherMediumRecall

JEE Main 28 July 2022, Shift 1, Chemistry Q80

Question 80 of 90 in this shift, Chemistry question 20 of 30, Section A.

For kinetic study of the reaction of iodide ion with H2O2\mathrm{H_2O_2} at room temperature : (A) Always use freshly prepared starch solution. (B) Always keep the concentration of sodium thiosulphate solution less than that of KI solution. (C) Record the time immediately after the appearance of blue colour. (D) Record the time immediately before the appearance of blue colour. (E) Always keep the concentration of sodium thiosulphate solution more than that of KI solution. Choose the correct answer from the options given below :
  1. (1)(A), (B), (C) onlyOfficial answer
  2. (2)(A), (D), (E) only
  3. (3)(D), (E) only
  4. (4)(A), (B), (E) only

Official answer

Option 1

NTA final key (2022 Session 2).

Chapter
Chemical Kinetics
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

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.