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MHT CET Physics question

PhysicsNucleiMHT CET

A mixture consists of two radioactive materials and with half lives of 20 s and 10 s respectively. Initially, the mixture has 40 g of and 160 g of . The amount of the two in the mixture will become equal after

Answer: (D)

Solution

Equal amounts require , i.e. , so

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Question ID VK-084782