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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceTwo statementsMediumConceptual

JEE Main 3 August 2021, Shift 2, Chemistry Q31

Question 31 of 90 in this shift, Chemistry question 1 of 30, Section A.

Given below are two statements : Statement I : In dichromate ion, all the Cr—O bonds are of equal length. Statement II : In dichromate ion, the Cr–O–Cr bond angle is less than the H—O—H bond angle in water 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 falseOfficial 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
Dichromate Reactions

Same idea in other shifts

Asked 3× in all
  1. 4 Apr 2026, Shift 1 · Q61Correct statements from the following are A. Potassium dichromate is an oxidising agent and it oxidises FeSO4\mathrm{FeSO_4} to…MediumOther
  2. 8 Apr 2024, Shift 2 · Q68The equilibrium Cr2O72−⇌2CrO42−\mathrm{Cr_2O_7^{2-} \rightleftharpoons 2CrO_4^{2-}} is shifted to the right in :EasySingle 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.