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Nuclear Chemistry (historical) JEE Main PYQs (2002–2021) with Solutions — Chemistry | JEE Arc

Chemistry

Nuclear Chemistry (historical)

Historical chapter — outside the current JEE Main unit list. These older questions remain available for reference.

Appeared 9 times across 6 years of JEE Main papers — about 1.5 questions a year. Every one of them is below, with a full worked solution.

Questions per year

1’02

2’03

2’04

1’05

2’07

1’21

Q01JEE Main 2004Annual, Paper 1MediumNuclear Chemistry (historical)9× since 2002

Consider the following nuclear reactions

{}_{92}^{238}M \to {}_Y^XN + 2{}_2^4He

{}_Y^XN \to {}_B^AL + 2{\beta ^ + }

The number of neutrons in the element L is