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A radioactive element decays by beta- em...

A radioactive element decays by `beta-` emission. A detector records " beta particles in 2 second it records (0.75 n beta particles (Given In2 = 0.6931, In3 = 1.0986). The mean life correct to nearest whole number is........... Second

A

3

B

5

C

7

D

6

Text Solution

Verified by Experts

The correct Answer is:
C
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