NEET Physics Nuclei Online Test Set A

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Question 1

Question

Half-lives of two radioactive elements A and B are 20 minutes and 40 minutes, respectively. Initially, the samples have equal number of nuclei. After 80 minutes, the ratio of decayed number of A and B nuclei will be

Answer

1 : 4

4 : 1

1 : 16

5 : 4