JEE Main 2021 · ChemistryMultiple choiceSingle correctEasyCalculation

JEE Main 4 August 2021, Shift 2, Chemistry Q38

Question 38 of 90 in this shift, Chemistry question 8 of 30, Section A.

The oxidation states of Mn in

\mathrm{Mn_2(CO)_{10}}

\left[\mathrm{Mn(CO)_5Br}\right]

and

\mathrm{K}\left[\mathrm{Mn(CN)_6}\right]

are, respectively,

(1)0, +6, +5
(2)+5, +6, +6
(3)0, +1, +6
(4)0, +1, +5Official answer

Official answer

Option 4

NTA final key.

Chapter: Coordination Compounds
Topic: Coordination Nomenclature
Idea tested: Oxidation State Calculation

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Asked 7× in all

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