JEE Main 2021 · ChemistryNumerical answerNumerical valueEasyRecall

JEE Main 26 February 2021, Shift 1, Chemistry Q59

Question 59 of 90 in this shift, Chemistry question 29 of 30, Section B.

Dichromate ion is treated with base, the oxidation number of Cr in the product formed is __________.

Official answer

NTA final key.

Chapter: The d- and f-Block Elements
Topic: d-Block Elements
Idea tested: Chromate-Dichromate pH Equilibrium

Same idea in other shifts

Asked 2× in all

3 Aug 2021, Shift 1 · Q35Sodium chromate reacts with hydrogen peroxide ( $\mathrm{H_2O_2}$ ) in the presence of dilute sulphuric acid to yieldMediumSingle 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.