JEE Main 2024 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 29 January 2024, Shift 1, Chemistry Q67

Question 67 of 90 in this shift, Chemistry question 7 of 30, Section A.

\mathrm{KMnO_4}

decomposes on heating at 513K to form

\mathrm{O_2}

along with

(1) $\mathrm{MnO_2}$ & $\mathrm{K_2O_2}$
(2) $\mathrm{K_2MnO_4}$ & $\mathrm{MnO_2}$ Official answer
(3) $\mathrm{Mn}$ & $\mathrm{KO_2}$
(4) $\mathrm{K_2MnO_4}$ & $\mathrm{Mn}$

Official answer

Option 2

NTA final key.

Chapter: The d- and f-Block Elements
Topic: d-Block Elements
Idea tested: Thermal Decomposition of KMnO4

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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.