Samples of two radioactive nuclides A and B are taken. λAand λB are the disintegration constants of A and B respectively. In which of the following cases, the two samples can simultaneously have the same decay rate at any time?
(a) Initial rate of decay of A is twice the initial rate of decay of B and λA = λB
(b) Initial rate of decay of A is twice the initial rate of decay of B and λA > λB
(c) Initial rate of decay of B is twice the initial rate of decay of A and λA > λB
(d) Initial rate of decay of B is same as the rate of decay of A at t = 2h and λA < λB
Samples of two radioactive nuclides A and B are taken. λAand λB are the disintegration constants of A and B respectively. In which of the following cases, the two samples can simultaneously have the same decay rate at any time?
(a) Initial rate of decay of A is twice the initial rate of decay of B and λA = λB
(b) Initial rate of decay of A is twice the initial rate of decay of B and λA > λB
(c) Initial rate of decay of B is twice the initial rate of decay of A and λA > λB
(d) Initial rate of decay of B is same as the rate of decay of A at t = 2h and λA < λB
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1 Answer
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This is a Multiple Choice Questions as classified in NCERT Exemplar
Answer- (b, d)
Explanation- this is only possible when rate of decay of 1 is almost double the rate of decay of other.so in this case initial decay of A must be twice of B. also Initial rate of decay of B is same as the rate of decay of A at t = 2h and λA < λB
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