JEE · NEET Previous Year Question
Two radioactive substances and originally have and nuclei respectively. Half life of is half ofthe half life of . After there half lives of , number of nuclei of both are equal. The ratio will be equal to:
Topic: JEE PYQ
Answer: A. Full step-by-step solution below.
- A
- B
- C
- D
Correct answer: A
Solution
(a) After half life no of nuclei undecayedgiven
So half life of half life of
Given,(after )
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