Learn

Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceSingle correctMediumRecall

JEE Main 3 August 2021, Shift 1, Chemistry Q35

Question 35 of 90 in this shift, Chemistry question 5 of 30, Section A.

Sodium chromate reacts with hydrogen peroxide (H2O2\mathrm{H_2O_2}) in the presence of dilute sulphuric acid to yield
  1. (1)Chromyl chloride
  2. (2)Chromium pentoxideOfficial answer
  3. (3)Sodium dichromate
  4. (4)Chromium sulphate

Official answer

Option 2

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
  1. 26 Feb 2021, Shift 1 · Q59Dichromate ion is treated with base, the oxidation number of Cr in the product formed is __________.EasyNumerical value

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.