Pick out the correct statements from the following I. Electron emission during β-decay is always accompanied by neutrons II. Nuclear force is charge independent III. Fusion is the chief source of stellar energy
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The phenomenon of radioactivity
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(a) increases on applied pressure (b) is exothermic change which increases or decreases with temperature (c) is nuclear process which does not depend on external forces (d) None […]
The purpose of using heavy water in nuclear reactor is
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(a) to increase the energy released in nuclear fission (b) to cool the reactor to room temperature (c) to make the dynamo […]
In radioactive element, β-rays are emitted from
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(a) Nucleus (b) Outer orbit (c) Inner orbit (d) None of these
Correct Answer:
Nucleus
Explanation:
β-rays are emitted from nucleus.
A U²³⁵ reactor generates power at a rate of P producing 2×10⁸ fission per second. The energy released per fission is 185 MeV. The value of P is
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(a) 59.2 MW (b) […]
When ₉₀Th²²⁸ transforms to ₈₃Bi²¹², the number of emitted α and β particles are respectively
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(a) 8 α,7 β (b) 4 α,7 β (c) 4 α,4 β (d) 4 α,1 β
Correct Answer: […]
The S.I. unit of radioactivity is
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(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
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(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
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(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?
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(a) Isobar of original nucleus is produced (b) Isotope of the original nucleus is […]
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