JEE Main 2024 · ChemistryMultiple choiceSingle correctEasyConceptual

JEE Main 30 January 2024, Shift 2, Chemistry Q70

Question 70 of 90 in this shift, Chemistry question 10 of 30, Section A.

The orange colour of

\mathrm{K_2Cr_2O_7}

and purple colour of

\mathrm{KMnO_4}

is due to

(1)d $\to$ d transitions in both
(2)d $\to$ d transitions in $\mathrm{K_2Cr_2O_7}$ and charge transfer transitions in $\mathrm{KMnO_4}$ .
(3)d $\to$ d transitions in $\mathrm{KMnO_4}$ and charge transfer transitions in $\mathrm{K_2Cr_2O_7}$ .
(4)Charge transfer transition in both.Official answer

Official answer

Option 4

NTA final key.

Chapter: The d- and f-Block Elements
Topic: d-Block Elements
Idea tested: Ligand-to-Metal Charge Transfer (LMCT)

Same topic in other shifts

All d-Block Elements questions

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 42 of the 174 JEE Main shifts held from 2017 to 2026.