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Ten grams of ^57 Co kept in an open cont...

Ten grams of `^57 Co` kept in an open container beta-decays with a half-life of 270 days. The weight of the material inside the container after 540 days will be very nearly

A

10 g

B

5 g

C

2.5 g

D

1.25 g

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A
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HC VERMA-THE NUCLEOUS-Objective 1
  1. The mass of a neutral carbon atom in ground state is

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  2. The mass number of a nucleus is equal to

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  3. As compared to ^12C atom, ^14C atoms has

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  4. The mass number of a nucleus is equal to

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  5. The graph of 1n (R/R0) versus 1n A (R = radius of a nucleus and A = it...

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  6. Let F(pp), F(pn) and F(nn) denote the magnitudes of the nuclear force ...

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  7. Let Fpp, Fpn and Fnn denote the magnitudes of the nuclear force by a p...

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  8. Two protons are kept at a separation of 10 nm. Let Fn and Fe be the nu...

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  9. As the mass number A increases, the binding energy per nucleon in a nu...

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  10. Which of the following is a wrong description of binding energy of a n...

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  11. In one average-life,

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  12. In a radioactive decay, neither the atomic number nor the mass number ...

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  13. During a negative beta decay,

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  14. A freshly prepared radioactive source of half-life 2 h emits radiation...

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  15. The decay constant of a radioactive sample is lambda. The half-life an...

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  16. An alpha particle is bombarded on ^14N. As a result, a ^17O nucleus is...

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  17. Ten grams of ^57 Co kept in an open container beta-decays with a half-...

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  18. Free ^238 U nuclei kept in a train emit alpha particles. When the trai...

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  19. During a nuclear fission reaction,

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