Nuclear & Radiochemistry — JEE Main PYQs & Practice Questions

Nuclear & Radiochemistry is a Chemistry chapter in the JEE Main syllabus. This page brings together 10 previous-year and practice questions on Nuclear & Radiochemistry, organised into 2 topics: Radioactive Decay Series and Artificial Radioactivity. Most questions come with a step-by-step solution you can work through free in PrepWiser.

Download Nuclear & Radiochemistry JEE Main PYQs as a free PDF (with answer key)

Chapter weightage: how many questions each chapter had per shift in the 2024–26 papers.

Radioactive Decay Series

• During the nuclear explosion, one of the products is ⁹⁰Sr with half life of 6.93 years…
• Isotope(s) of hydrogen which emits low energy β - particles with t 1/2 value > 12 years…
• The half-life of radioisotope bromine - 82 is 36 hours. The fraction which remains after…
• A radioactive element has a half life of 200 days. The percentage of original activity…
• A and B are two substances undergoing radioactive decay in a container. The half life of…
• The number of neutrons and electrons, respectively, present in the radioactive isotope…
• The ratio of (¹⁴ C)/(¹² C) in a piece of wood is 1/8 part that of atmosphere. If half…
• Assuming 1 μ g of trace radioactive element X with a half life of 30 years is absorbed…
• Which of the following statement is not true for radioactive decay?

Artificial Radioactivity

• Which of the following forms of hydrogen emits low energy β⁻ particles?

More Chemistry chapters

• Mole Concept & Stoichiometry
• Atomic Structure
• Gaseous State
• Chemical Thermodynamics
• Chemical Equilibrium
• Ionic Equilibrium
• Redox Reactions
• Solutions & Colligative Properties
• Electrochemistry
• Chemical Kinetics
• Solid State
• Surface Chemistry
• Periodic Table & Periodicity
• Chemical Bonding & Molecular Structure
• Hydrogen & s-Block Elements
• p-Block Elements — Part I (Group 13 & 14)
• Environmental Chemistry
• p-Block Elements — Part II (Group 15-18)
• d & f Block Elements
• Coordination Compounds
• Metallurgy
• Qualitative Analysis — Salt Analysis
• Purification & Characterisation of Organic Compounds
• General Organic Chemistry (GOC)
• Hydrocarbons — Alkanes
• Hydrocarbons — Alkenes & Alkynes
• Hydrocarbons — Aromatic (Arenes)
• Halogen Derivatives — Haloalkanes & Haloarenes
• Alcohols, Phenols & Ethers
• Aldehydes & Ketones
• Carboxylic Acids & Their Derivatives
• Amines & Diazonium Salts
• Carbohydrates & Biomolecules
• Polymers
• Chemistry in Everyday Life
• Practical Organic Chemistry

Frequently asked questions

How many Nuclear & Radiochemistry questions are there for JEE Main?

PrepWiser has 10 Nuclear & Radiochemistry questions for JEE Main, grouped into 2 topics such as Radioactive Decay Series and Artificial Radioactivity.

Are these Nuclear & Radiochemistry questions from previous-year JEE Main papers?

Yes — most are genuine previous-year questions from past JEE Main papers, and the rest are practice questions written to match the JEE Main pattern and difficulty.

Where can I see the answers and solutions to these Nuclear & Radiochemistry questions?

Open any Nuclear & Radiochemistry question in PrepWiser (it is free) to attempt it; most come with a step-by-step solution.