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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceSingle correctEasyConceptual

JEE Main 24 February 2021, Shift 1, Chemistry Q35

Question 35 of 90 in this shift, Chemistry question 5 of 30, Section A.

(A) HOCl+H2O2→H3O++Cl−+O2\mathrm{HOCl + H_2O_2 \rightarrow H_3O^+ + Cl^- + O_2} (B) I2+H2O2+2OH−→2I−+2H2O+O2\mathrm{I_2 + H_2O_2 + 2OH^- \rightarrow 2I^- + 2H_2O + O_2} Choose the correct option.
  1. (1)H2O2\mathrm{H_2O_2} acts as oxidising agent in equations (A) and (B).
  2. (2)H2O2\mathrm{H_2O_2} acts as reducing agent in equations (A) and (B).Official answer
  3. (3)H2O2\mathrm{H_2O_2} act as oxidizing and reducing agent respectively in equations (A) and (B).
  4. (4)H2O2\mathrm{H_2O_2} acts as reducing and oxidising agent respectively in equations (A) and (B).

Official answer

Option 2

NTA final key.

Chapter
Redox Reactions
Topic
Hydrogen and Hydrides
Idea tested
Redox Behavior of Hydrogen Peroxide

Same idea in other shifts

Asked 4× in all
  1. 28 Jul 2022, Shift 2 · Q57On reaction with stronger oxidizing agent like KIO4\mathrm{KIO_4}, hydrogen peroxide oxidizes with the evolution of O2\mathrm{O_2}. The…EasyNumerical value
  2. 29 Jun 2022, Shift 1 · Q68Which one of the following reactions indicates the reducing ability of hydrogen peroxide in basic medium ?MediumSingle correct
  3. 16 Mar 2021, Shift 2 · Q35The correct statements about H2O2\mathrm{H_2O_2} are : (A) used in the treatment of effluents. (B) used as both oxidising and reducing…MediumOther

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.