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Physical Chemistry -- Nuclear Chemistry
16.
Which of the following processes causes the emission of an X-ray?
- A.Alpha emission
- B.(a) Alpha emission (b) G
- C.Positron emission
- D.Electron capture
- Answer
- Report
Answer : [D]
17.
With increasing nuclear size,
- A.the repulsive force between the protons increases and so does the energy of the nucleus
- B.the repulsive force between the protons decreases and the energy of the nucleus increases
- C.the attractive force between the protons increases and so does the energy of the nucleus
- D.the attractive force between the protons decreases and so does the energy of the nucleus
- Answer
- Report
Answer : [A]
18.
Temperature has no effect on rate of decay because
- A.sp2nuclear energies are very high
- B.sp3nuclear energies are low
- C.sp2radioactive decay is a statistical process
- D.sp2radioactive decay follows exponential law
- Answer
- Report
Answer : [A]
19.
Nuclear isomers are nuclei with the same
- A.number of electrons, protons and electrons, and have the same half-life
- B.number of protons and neutrons but their energy levels are different
- C.number of protons and neutrons, and the same energy levels
- D.value of half-life and average life
- Answer
- Report
Answer : [B]
20.
The mechanism of nuclear fission is explained on the basis of
- A.magic number of the nucleus
- B.binding energy
- C.liquid-drop model
- D.viscosity of the nucleus
- Answer
- Report
Answer : [C]
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