If 8.0 g of radioactive isotope has a half life of 10 hours, the half life of 2.0 g of the same substance is :

2.5 hours

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5.0 hours

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10 hours

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40 hours

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Solution

The correct option is C 10 hours
If 8.0 g of radioactive isotope has a half life of 10 hours, the half life of 2.0 g of the same substance is 10 hours as half life is independent to the initial amount of substance.

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