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Saturday, 31 October

JEE Main 2024 · ChemistryNumerical answerNumerical valueMediumMulti-step

JEE Main 5 April 2024, Shift 2, Chemistry Q86

Question 86 of 90 in this shift, Chemistry question 26 of 30, Section B.

The fusion of chromite ore with sodium carbonate in the presence of air leads to the formation of products A and B along with the evolution of CO2\mathrm{CO_2}. The sum of spin-only magnetic moment values of A and B is ________ B.M. (Nearest integer) [Given atomic number : C : 6, Na : 11, O : 8, Fe : 26, Cr : 24]

Official answer

6

NTA final key.

Chapter
The d- and f-Block Elements
Topic
d-Block Elements
Idea tested
Preparation Steps of Potassium Dichromate

Same idea in other shifts

Asked 3× in all
  1. 10 Apr 2023, Shift 1 · Q79Given below are two statements: Statement I : Aqueous solution of K2Cr2O7\mathrm{K_2Cr_2O_7} is preferred as a primary standard in volumetric…MediumTwo statements
  2. 29 Jun 2022, Shift 1 · Q86The number of terminal oxygen atoms present in the product B obtained from the following reaction is ____________.…MediumNumerical 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.