JEE Main 2022 · ChemistryMultiple choiceSingle correctMediumApplication

JEE Main 29 June 2022, Shift 1, Chemistry Q68

Question 68 of 90 in this shift, Chemistry question 8 of 30, Section A.

Which one of the following reactions indicates the reducing ability of hydrogen peroxide in basic medium ?

(1) $\mathrm{HOCl + H_2O_2 \rightarrow H_3O^+ + Cl^- + O_2}$
(2) $\mathrm{PbS + 4H_2O_2 \rightarrow PbSO_4 + 4H_2O}$
(3) $\mathrm{2MnO_4^- + 3H_2O_2 \rightarrow 2MnO_2 + 3O_2 + 2H_2O + 2OH^-}$ Official answer
(4) $\mathrm{Mn^{2+} + H_2O_2 \rightarrow Mn^{4+} + 2OH^-}$

Official answer

Option 3

NTA final key (2022 Session 1).

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

Same idea in other shifts

Asked 4× in all

28 Jul 2022, Shift 2 · Q57On reaction with stronger oxidizing agent like $\mathrm{KIO_4}$ , hydrogen peroxide oxidizes with the evolution of $\mathrm{O_2}$ . The…EasyNumerical value
24 Feb 2021, Shift 1 · Q35(A) $\mathrm{HOCl + H_2O_2 \rightarrow H_3O^+ + Cl^- + O_2}$ (B) $\mathrm{I_2 + H_2O_2 + 2OH^- \rightarrow 2I^- + 2H_2O + O_2}$ Choose the…EasySingle correct
16 Mar 2021, Shift 2 · Q35The correct statements about $\mathrm{H_2O_2}$ 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.