The S.I. unit of radioactivity is
Options
(a) Roentgen (b) Rutherford (c) Curie (d) Becquerel
Correct Answer:
Becquerel
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
The nuclear fusion reaction between deutrium and tritium takes place
Options
(a) at low temperature and low pressure (b) at very high temperature and very high pressure (c) when the temperature is near […]
In a given reaction, ᴢXᴬ → ᴢ+1Yᴬ → ᴢ-1Kᴬ⁻⁴ → ᴢ-1Kᴬ⁻⁴ The radioactive radiations are emitted in the sequence of
Options
(a) α,β,γ (b) γ,α,β (c) β,α,γ (d) γ,β,α
Correct Answer:
β,α,γ
Explanation: […]
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:
No explanation available. Be the first […]
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:
No explanation available. Be the first to […]
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: […]
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