JEE Main · Chemistry · The Solid State

Non-Stoichiometric Composition Calculations

JEE Main asked Non-Stoichiometric Composition Calculations once in the 108 shifts Lumi analysed, on 27 Jun 2022, Shift 1. It belongs to Solid State Defects, in The Solid State (Chemistry).

Updated 2026-10-24

Times asked: 1; in 1 shift
Years: 1 of 8
First asked: 2022; the only year
Pattern: Occasional; asked once so far

Questions on this idea a shift, by year

2017–2026. Asked in 2022. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 1 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

20260 of 9
20250 of 8
20240 of 18
20230 of 12
20221 of 24
20210 of 24
20200 of 12
20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Numerical value is the usual form. Skill tested: calculation.

Percentage of fe2+ in fe0.93o

Difficulty

Easy 0Medium 1Hard 0

1 of the 1 question had a numerical answer.

Every question

The question

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

27 Jun 2022, Shift 1 · Q81Metal deficiency defect is shown by $\mathrm{Fe_{0.93}O}$ . In the crystal, some $\mathrm{Fe^{2+}}$ cations are missing and loss of…MediumNumerical value

Shift: 27 Jun 2022, Shift 1.

Same topic

Other ideas in Solid State Defects

Solid State Defects has 7 ideas JEE Main has asked; 2 of them came up in more than one question.

Topic analysis Chapter analysis All repeated ideas