JEE Main · Chemistry · The Solid State
Impurity Defects and Doping
JEE Main asked Impurity Defects and Doping once in the 108 shifts Lumi analysed, on 17 Mar 2021, Shift 2. 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
- 2021
- the only year
- Pattern
- Gone quiet
- asked once so far
Questions on this idea a shift, by year
2017–2026. Asked in 2021. 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: 1 in 24 shifts · 2022: 0 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.
How JEE Main framed it
Numerical value is the usual form. Skill tested: calculation.
- Cation vacancies from aliovalent doping
Difficulty
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.
Shift: 17 Mar 2021, Shift 2.
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.
- Band Theory of Solids2× · 2024
- Frenkel Defect2× · 2021
- Non-Stoichiometric Composition Calculationsonce · 2022
- Schottky Defectonce · 2022
- Magnetic Propertiesonce · 2021
- AgBr Dual Defect Exceptiononce · 2020