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Chapter 18 Atomic and Nuclear Physics-10
1.
In which decay, the mass number Z of the parent nuclide decreases by 4?
a) Beta- decay
b) All of these
c) Gamma-decay
d) Alpha-decay
2.
In which decay, the proton number Z of the parent nuclide increases by 1?
a) None of these
b) Beta- decay
c) Alpha-decay
d) Gamma-decay
3.
In which decay, the atomic number Z of the parent nuclide increases by 1?
a) Alpha-decay
b) Gamma-decay
c) All of these
d) Beta- decay
4.
Alpha rays are actually………….?
a) Helium nuclei
b) Neutrons
c) Protons
d) Electrons
5.
In which decay, the mass number Z of the parent nuclide remains unchanged?
a) None of these
b) Alpha-decay
c) Gamma-decay
d) Beta- decay
6.
Which rays are usually emitted along with either an alpha or a beta particle?
a) All of these
b) Gamma- rays
c) Alpha- rays
d) Beta- rays
7.
What is the SI unit for radioactivity?
a) Henry
b) Ohm
c) Becquerel
d) Newton
8.
What does “dps” stand for?
a) Demonstration
b) Disintegration per second
c) Disintegration per square inch
d) Destruction per square inch
9.
How many dps are equal to 1 Bq?
a) 1 Bq = 1 dps
b) 1 Bq = 10 dps
c) 1 Bq = 0.5 dps
d) 1 Bq = 1/2 dps
10.
In which decay, the nucleon number Z of the parent nuclide remains unchanged?
a) None of these
b) Beta- decay
c) Alpha-decay
d) Gamma-decay
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