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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceAssertion–reasonEasyConceptual

JEE Main 28 July 2022, Shift 2, Chemistry Q39

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

Given below are two statements : One is labelled as **Assertion A** and the other is labelled as **Reason R** **Assertion A** : Permanganate titrations are not performed in presence of hydrochloric acid. **Reason R** : Chlorine is formed as a consequence of oxidation of hydrochloric acid. In the light of the above statements, choose the *correct* answer from the options given below
  1. (1)Both A and R are true and R is the correct explanation of AOfficial answer
  2. (2)Both A and R are true but R is NOT the correct explanation of A
  3. (3)A is true but R is false
  4. (4)A is false but R is true

Official answer

Option 1

NTA final key.

Chapter
The d- and f-Block Elements
Topic
d-Block Elements
Idea tested
HCl Limitation in KMnO4 Titrations

Same idea in other shifts

Asked 2× in all
  1. 4 Sep 2020, Shift 2 · Q35The incorrect statement(s) among (a) - (c) is (are) : (a) W(VI) is more stable than Cr(VI). (b) in the presence of HCl, permanganate…MediumOther

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.