JEE Main 2022 · ChemistryMultiple choiceSingle correctMediumConceptual

JEE Main 29 July 2022, Shift 1, Chemistry Q70

Question 70 of 90 in this shift, Chemistry question 10 of 30, Section A.

In neutral or faintly alkaline medium,

\mathrm{KMnO_4}

being a powerful oxidant can oxidize, thiosulphate almost quantitatively, to sulphate. In this reaction overall change in oxidation state of manganese will be :

(1)5
(2)1
(3)0
(4)3Official answer

Official answer

Option 4

NTA final key.

Chapter: The d- and f-Block Elements
Topic: d-Block Elements
Idea tested: Specific KMnO4 Oxidations in Neutral/Alkaline Medium

Same idea in other shifts

Asked 4× in all

29 Jan 2024, Shift 1 · Q68In alkaline medium, $\mathrm{MnO_4^-}$ oxidises $\mathrm{I^-}$ toMediumSingle correct
27 Jul 2022, Shift 2 · Q69In neutral or alkaline solution, $\mathrm{MnO_4^-}$ oxidises thiosulphate to :MediumSingle correct
27 Jul 2022, Shift 2 · Q87The oxidation state of manganese in the product obtained in a reaction of potassium permanganate and hydrogen peroxide in basic medium is…MediumNumerical 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 108 of the 174 JEE Main shifts held from 2017 to 2026.