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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceTwo statementsHardConceptual

JEE Main 27 July 2022, Shift 1, Chemistry Q71

Question 71 of 90 in this shift, Chemistry question 11 of 30, Section A.

Given below are two statements. Statement I: Iron (III) catalyst, acidified K2Cr2O7\mathrm{K_2Cr_2O_7} and neutral KMnO4\mathrm{KMnO_4} have the ability to oxidise I−\mathrm{I^-} to I2\mathrm{I_2} independently. Statement II: Manganate ion is paramagnetic in nature and involves pπ−pπ\mathrm{p\pi - p\pi} bonding. In the light of the above statements, choose the correct answer from the options given below.
  1. (1)Both Statement I and Statement II are true.
  2. (2)Both Statement I and Statement II are false.Official answer
  3. (3)Statement I is true but Statement II is false.
  4. (4)Statement I is false but Statement II is true.

Official answer

Option 2

NTA final key.

Chapter
The d- and f-Block Elements
Topic
d-Block Elements
Idea tested
Permanganate Reactions

Same idea in other shifts

Asked 5× in all
  1. 4 Apr 2024, Shift 1 · Q86Consider the following reaction MnO2+KOH+O2→A+H2O\mathrm{MnO_2 + KOH + O_2 \rightarrow A + H_2O}. Product 'A' in neutral or acidic medium…MediumNumerical value
  2. 3 Aug 2021, Shift 1 · Q39The correct statement for permanganate ion isMediumSingle correct
  3. 27 Aug 2021, Shift 2 · Q37Potassium permanganate on heating at 513 K gives a product which is :MediumSingle correct
  4. 17 Mar 2021, Shift 1 · Q39Given below are two statements : Statement I : Potassium permanganate on heating at 573 K forms potassium manganate. Statement II : Both…MediumTwo statements

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.