JEE Main 2022 · ChemistryMultiple choiceSingle correctEasyCalculation

JEE Main 26 July 2022, Shift 1, Chemistry Q69

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

The dark purple colour of

\mathrm{KMnO_4}

disappears in the titration with oxalic acid in acidic medium. The overall change in the oxidation number of manganese in the reaction is :

(1)5Official answer
(2)1
(3)7
(4)2

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

6 Apr 2023, Shift 2 · Q69During the reaction of permanganate with thiosulphate, the change in oxidation of manganese occurs by value of 3. Identify which of the…MediumSingle correct
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 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.