JEE Main 2023 · ChemistryMultiple choiceSingle correctMediumConceptual

JEE Main 6 April 2023, Shift 2, Chemistry Q69

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

During the reaction of permanganate with thiosulphate, the change in oxidation of manganese occurs by value of 3. Identify which of the below medium will favour the reaction.

(1)aqueous neutralOfficial answer
(2)aqueous acidic
(3)both aqueous acidic and faintly alkaline
(4)both aqueous acidic and neutral

Official answer

Option 1

NTA final key.

Chapter: Redox Reactions
Topic: Redox Reactions
Idea tested: Permanganate n-Factor Across Media

Same idea in other shifts

Asked 6× in all

10 Apr 2023, Shift 2 · Q90In alkaline medium, the reduction of permanganate anion involves a gain of ____________ electrons.EasyNumerical value
13 Apr 2023, Shift 1 · Q81 $\mathrm{KMnO_4}$ is titrated with ferrous ammonium sulphate hexahydrate in presence of dilute $\mathrm{H_2SO_4}$ . Number of water…EasyNumerical value
15 Apr 2023, Shift 1 · Q88The total change in the oxidation state of manganese involved in the reaction of $\mathrm{KMnO_4}$ and potassium iodide in the acidic…EasyNumerical value
26 Jul 2022, Shift 1 · Q69The dark purple colour of $\mathrm{KMnO_4}$ disappears in the titration with oxalic acid in acidic medium. The overall change in the…EasySingle correct
26 Feb 2021, Shift 2 · Q59In mildly alkaline medium, thiosulphate ion is oxidized by $\mathrm{MnO_4^-}$ to "A". The oxidation state of sulphur in "A" is __________.HardNumerical 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.