JEE Main 2023ChemistrySolid StateMediumNumerical

JEE Main 2023 — Solid State Question with Solution

JEE Main 2023 (31 Jan Shift 2)

Question

A sample of a metal oxide has formula M0.83O1.00. The metal M can exist in two oxidation states +2 and +3. In the sample of M0.83O1.00, the percentage of metal ions existing in +2 oxidation state is %. (nearest integer)

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Show full solutionCorrect answer: 59
Correct answer
59

Step-by-step explanation

Let number of ions of M+2=x

Thus, as net charge has to be zero, M+3=0.83-x

⇒2x+3(0.83-x)+1(-2)=0

⇒2x+2.49-3x-2=0

∴x=0.49

%M2+ ions =0.490.83×100=59.03

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About this question

This is a previous-year question from JEE Main 2023, covering the Solid State chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.