JEE Main 2022ChemistrySolid StateMediumNumerical

JEE Main 2022Solid State Question with Solution

JEE Main 2022 (27 Jun Shift 1)

Question

Metal deficiency defect is shown by Fe0.93O. In the crystal, some Fe2+ cations are missing and loss of positive charge is compensated by the presence of Fe3+ ions. The percentage of Fe2+ ions in theFe0.93O crystals is____(Nearest integer)

Enter your answer

Show full solutionCorrect answer: 85
Correct answer
85

Step-by-step explanation

In Fe0.93O for every 93Fe ions 14 are Fe+3 and 93-14=79 are Fe+2 ions

 %Fe+2=7993×100=84.9%

nearest integer =85%

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the Solid State chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.

Solve interactively →

About this question

This is a previous-year question from JEE Main 2022, 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.