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""(92)U^(238) on absorbing a neutron goe...

`""_(92)U^(238)` on absorbing a neutron goes over to `""_(92)U^(239)`. This nucleus emits an electron to go over to neptunium which on further emitting an electron goes over to plutonium. How would you represent the resulting plutonium ?

A

`""_(94)Pb^(239)`

B

`""_(92)Pb^(219)`

C

`""_(93)Pb^(240)`

D

`""_(92)Pb^(240)`

Text Solution

Verified by Experts

The correct Answer is:
D
Undecayed isotope`=1-(7)/(8)=(1)/(8)`
`(N)/(N_(0))=((1)/(2))^(t//T)`
`(1)/(8)=((1)/(2))^(t//15)=(t)/(15)=3`
`implies t=45h`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-ATOMS, MOLECULES AND NUCLEI -Exercise 1 (TOPICAL PROBLEMS)
  1. A free neutron decays spontaneously into

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  2. In the nuclear reaction ""(7)N^(14)+X to ""(6)C^(14)+""(1)H^(2), the X...

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  3. ""(92)U^(238) on absorbing a neutron goes over to ""(92)U^(239). This ...

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  4. IF in a nuclear fission, piece of uranium of mass 5.0g is lost, the en...

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  5. The energy released by the fission of one uranium atom is 200 MeV. The...

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  6. An alpha-particlee of mass m suffers one dimensional elastic collision...

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  7. The operation of a nuclear reactor is said to be critical, if the mult...

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  8. On bombardment of U^235 by slow neutrons, 200 MeV energy is released. ...

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  9. The binding energies of the atoms of elements A and B are E(a) and E(b...

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  10. If 200 MeV of energy is released in the fission of 1 nucleus of ""(92)...

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  11. If 200 MeV energy is released in the fission of a single nucleus of .(...

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  12. When a sample of solid lithium is placed in a flask of hydrogen gas th...

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  13. What is de-Broglie wavelength of the electron accelerated through a po...

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  14. What is de-Broglie wavelength of the electron accelerated through a po...

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  15. In Davisson-Germer experiment maximum intensity is observed at

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  16. The energy of a photon is equal to the kinetic energy of a proton. If ...

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  17. If the linear momentum of a particle is 2.2xx10^(4)kg-ms^(-1), then wh...

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  18. An electron is accelerated under a potential difference of 182 V. the ...

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  19. The kinetic energy of an electron gets tripled, then the de-Broglie wa...

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  20. The de-Broglie wavelength of the electron in the ground state of the h...

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