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Topic Crystal Defects
Asked 2 times in ESE over 1 years (2025–2026), peaking in 2025.
Key insights
- Most tested in ESE — 2 of 2 PYQs
- Most asked in 2025
- Recurs across 2 years (2025–2026)
Across exams
ESE · 2How the concept evolved
Rising — more than half its appearances (2 of 2) are since 2016.
Related concepts
Ideas UPSC tests alongside this one — keep exploring.
Sample questions
You've seen the pattern — here are a few of the actual PYQs.
ESE2026
In crystal materials, the equilibrium number of vacancies in crystalline solid increases
- A linearly with temperature
- B exponentially with temperature
- C exponentially and then decreases with temperature
- D linearly and then exponentially with temperature
Answer key not yet available (pending official release)
Engineering › Engineering Mathematics & General
ESE2025
In which one of the following dislocations, an extra portion of a plane of atoms or half plane, the edge of which terminates within the crystal?
- A Screw dislocation
- B Edge dislocation
- C Mixed dislocation
- D Burgers dislocation
Answer key not yet available (pending official release)
Engineering › Mechanical
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