JEE Main · Physics · Nuclei
Q-Value of a Reaction
JEE Main asked Q-Value of a Reaction 2 times in 2 of the 108 shifts Lumi analysed, all in 2024. It belongs to Fission and Fusion, in Nuclei (Physics). In 2024 it came in more than one shift of the same year.
Updated 2026-10-24
- Times asked
- 2
- in 2 shifts
- Years
- 1 of 8
- First asked
- 2024
- the only year
- Pattern
- New since 2024
- across the analysed shifts
Questions on this idea a shift, by year
2017–2026. Asked in 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.
Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 2 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.
- Reaction rate from stellar power and q-value
- Q value of fission from atomic masses
Difficulty
2 of the 2 questions had a numerical answer.
Every question
All 2 questions
From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.
- 9 Apr 2024, Shift 1 · Q60A star has helium composition. It starts to convert three into one via triple alpha process…HardNumerical value
- 4 Apr 2024, Shift 2 · Q51The disintegration energy for the nuclear fission of is ________ MeV. Given atomic masses of…MediumNumerical value
Shifts: 4 Apr 2024, Shift 2, 9 Apr 2024, Shift 1.
Same topic
Other ideas in Fission and Fusion
Fission and Fusion has 7 ideas JEE Main has asked; 2 of them came up in more than one question.
- Nuclear Fission Mechanics2× · 2024
- Q-Value Sign Conventiononce · 2025
- Energy Density Comparisononce · 2024
- Fission Fragment Kinematicsonce · 2024
- Mass Defect to MeV Conversiononce · 2024
- Reactor Power Calculationonce · 2020