JEE Main 2023 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 13 April 2023, Shift 1, Chemistry Q81

Question 81 of 90 in this shift, Chemistry question 21 of 30, Section B.

\mathrm{KMnO_4}

is titrated with ferrous ammonium sulphate hexahydrate in presence of dilute

\mathrm{H_2SO_4}

. Number of water molecules produced for 2 molecules of

\mathrm{KMnO_4}

is_________

Official answer

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
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.