Nuclei
Class 12 · Nuclei · Practice
Radioactive Decay — Previous-Year Questions
5 previous-year questions on Radioactive Decay, drawn from JEE Mains, JEE Advanced, NEET UG, and CUET papers. Every question carries a worked-out explanation.
Q1. A radioactive sample has T_½ = 10 minutes. Initial activity is 80 Bq. After 30 minutes, activity is:
JEE 2022Q2. Decay constant of an isotope with half-life 2 years:
JEE 2021Q3. In α-decay, the daughter nucleus has:
JEE 2020Q4. In β⁻-decay, the nuclear mass number A:
JEE 2019Q5. Which radiation is MOST penetrating?
JEE 2018Radioactive Decay previous-year questions from sciphylab (also known as SciPhy, SciPhy Lab, SciPhy Labs, Physics Lab). Class 12 physics practice for JEE Mains, JEE Advanced, NEET UG, AP Physics 1/2/C, SAT, and CUET-UG candidates.