JEE Main 2024 · ChemistryMultiple choiceSingle correctEasyConceptual

JEE Main 9 April 2024, Shift 1, Chemistry Q68

Question 68 of 90 in this shift, Chemistry question 8 of 30, Section A.

The electronic configuration of Cu(II) is

3d^9

whereas that of Cu(I) is

3d^{10}

. Which of the following is correct ?

(1)Cu(II) is more stableOfficial answer
(2)Cu(II) is less stable
(3)Cu(I) and Cu(II) are equally stable
(4)Stability of Cu(I) and Cu(II) depends on nature of copper salts

Official answer

Option 1

NTA final key.

Chapter: The d- and f-Block Elements
Topic: d-Block Elements
Idea tested: Aqueous Stability of Cu+ vs Cu2+

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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.