For the radioactive nuclei that undergo either α or β decay, which one of the following cannot occur?
Options
(a) Isobar of original nucleus is produced (b) Isotope of the original nucleus is […]
The relationship between decay constant λ and half-life T of a radioactive substance is
Options
(a) λ=log₁₀2/T (b) λ=logₑ2/T (c) λ=log₂10/T (d) λ=log₂e/T
Correct Answer:
λ=logₑ2/T
Explanation:
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The half life of radium is 1620 yr and its atomic weight is 226 kg per kilo mol. The number of atoms that will dacay from its 1g sample per second will be (take, Avogadro’s […]
The energy released by the fission of one uranium atom is 200 MeV. The number of fission per second required to produce 6.4 W power is
Options
(a) 2×10¹¹ (b) 10¹¹ (c) 10¹⁰ (d) […]
Nuclear fission is not found in
Options
(a) thermonuclear reactor (b) hydrogen bomb (c) energy production in sun (d) atom bomb
Correct Answer:
atom bomb
Explanation:
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In a nuclear reactor, the number of U²³⁵ nuclei undergoing fissions per second is 4×10²⁰. If the energy released per fission is 250 MeV, then the total energy released in 10 h is (1 eV=1.6×10⁻¹⁹ […]
The kinetic energy of α-particle emitted in the α-dacay of ₈₈Ra²²⁶ is [given, mass number of Ra=222 u]
Options
(a) 5.201 MeV (b) 3.301 MeV (c) 6.023 MeV (d) 4.871 MeV
Correct Answer: […]
What is the energy released by fission of 1 g of U²³⁵? (Assume 200 MeV energy is liberated on fission of 1 nucleus)
Options
(a) 2.26×10⁴ kWh (b) 1.2×10⁴ kWh (c) 4.5×10⁴ kWh (d) […]
In which of the follows decays, the element does not change?
Options
(a) β-decay (b) α-decay (c) γ-decay (d) None of these
Correct Answer:
γ-decay
Explanation:
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A radioactive nucleus emits a beta particle. The parent and daughter nuclei are
Options
(a) Isotopes (b) Isotones (c) Isomers (d) Isobars
Correct Answer:
Isobars
Explanation:
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