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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceTwo statementsMediumConceptual

JEE Main 17 March 2021, Shift 1, Chemistry Q39

Question 39 of 90 in this shift, Chemistry question 9 of 30, Section A.

Given below are two statements : Statement I : Potassium permanganate on heating at 573 K forms potassium manganate. Statement II : Both potassium permanganate and potassium manganate are tetrahedral and paramagnetic in nature. In the light of the above statements, choose the most appropriate answer from the options given below :
  1. (1)Both statement I and statement II are false
  2. (2)Both statement I and statement II are true
  3. (3)Statement I is true but statement II is falseOfficial answer
  4. (4)Statement I is false but statement II is true

Official answer

Option 3

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. 27 Jul 2022, Shift 1 · Q71Given below are two statements. Statement I: Iron (III) catalyst, acidified K2Cr2O7\mathrm{K_2Cr_2O_7} and neutral KMnO4\mathrm{KMnO_4} have the…HardTwo statements
  3. 3 Aug 2021, Shift 1 · Q39The correct statement for permanganate ion isMediumSingle correct
  4. 27 Aug 2021, Shift 2 · Q37Potassium permanganate on heating at 513 K gives a product which is :MediumSingle correct

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.