Atoms And Nuclei — JEE Advanced Previous Year Questions
26 solved PYQs · 2016–2026 · Physics
- Solved PYQs
- 26
- Years covered
- 2016–2026
- Avg / year
- ~2
- Subject
- Physics
How many JEE Advanced questions come from Atoms And Nuclei?
Atoms And Nuclei has contributed 26 questions to Joint Entrance Examination (Advanced) papers between 2016 and 2026 — an average of about 2 questions a year. That count is measured from EByAi’s bank of 18,502 JEE Advanced questions, not estimated from a syllabus. Every one of the 26 questions carries a written, step-by-step solution, and each is tagged to Atoms And Nuclei within Physics, so you can drill this chapter across every year at once instead of hunting through paper PDFs. Practising a chapter’s full PYQ history is the fastest way to learn the patterns examiners reuse.
Sample Atoms And Nuclei questions from real JEE Advanced papers
These are 2 real questions from the bank — exactly as asked, with the answer one tap away. All 26 Atoms And Nuclei questions (with full written solutions) are available in practice.
Question 1 · JEE Advanced 2021
A heavy nucleus Q of half-life 20 minutes undergoes alpha-decay with probability of 60% and beta-decay with probability of 40%. Initially, the number of Q nuclei is 1000. The number of alpha-decays of Q in the first one hour is- (A)50
- (B)75
- (C)350
- (D)525
Show answerAnswer
Answer: (D) 525Question 2 · JEE Advanced 2016
An accident in a nuclear laboratory resulted in deposition of a certain amount of radioactive material of half-life 18 days inside the laboratory. Tests revealed that the radiation was 64 times more than the permissible level required for safe operation of the laboratory. What is the minimum number of days after which the laboratory can be considered safe for use?- (A)64
- (B)90
- (C)108
- (D)120
Show answerAnswer
Answer: (C) 108
Atoms And Nuclei questions by year
| Year | Questions | Share of chapter questions |
|---|---|---|
| 2026 | 2 | |
| 2025 | 1 | |
| 2024 | 1 | |
| 2023 | 2 | |
| 2022 | 3 | |
| 2021 | 3 | |
| 2020 | 2 | |
| 2019 | 3 | |
| 2018 | 2 | |
| 2017 | 2 | |
| 2016 | 5 |
Practise these 26 questions with solutions
Free to start — 25 past-year questions a day with full written solutions, no card needed.
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How many JEE Advanced questions have been asked from Atoms And Nuclei?
EByAi's bank holds 26 real JEE Advanced questions from Atoms And Nuclei, asked between 2016 and 2026 — about 2 per year on average. Every count is measured from actual papers, not estimated.
Is Atoms And Nuclei important for JEE Advanced?
26 questions over 11 papers make Atoms And Nuclei a steady-weightage chapter in JEE Advanced Physics. The year-wise table above shows exactly how often it appears.
Can I solve Atoms And Nuclei PYQs online for free?
Yes. EByAi lets you solve JEE Advanced past-year questions in the browser with written solutions — free daily practice, no card needed.