Physics 10th Class Chapter 9: Atomic and Nuclear Physics Exercise Quiz Online
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Below are some important MCQs with answers for Chapter 9: Atomic and Nuclear Physics.
Solved MCQs for Chapter 9: Atomic and Nuclear Physics
(I.) Isotopes are atoms of the same element with different: (Chapter 9)
a
atomic mass
b
atomic number
c
number of protons
d
number of electrons
(II.) One of the isotopes of uranium is 92238U. The number of neutrons in this isotope is: (Chapter 9)
a
92
b
146
c
238
d
330
(III.) Which among the following radiations has more penetrating power? (Chapter 9)
a
a beta particle
b
a gamma ray
c
an alpha particle
d
all have the same penetrating ability
(IV.)What happens to the atomic number of an element which emits one alpha particle? (Chapter 9)
a
increases by 1
b
stays the same
c
decreases by 2
d
decreases by 1
(V.) The half-life of a certain isotope is 1 day. What is the quantity of the isotope after 2 days? (Chapter 9)
a
one-half
b
one-quarter
c
one-eighth
d
none of these
(VI.) When Uranium (92 protons) ejects a beta particle, how many protons will be in the remaining nucleus? (Chapter 9)
a
89 protons
b
90 protons
c
91 protons
d
93 protons
(VII.) Release of energy by the Sun is due to: (Chapter 9)
a
nuclear fission
b
nuclear fusion
c
burning of gases
d
chemical reaction
(VIII.) When a heavy nucleus splits into two lighter nuclei, the process would: (Chapter 9)
a
release nuclear energy
b
absorb nuclear energy
c
release chemical energy
d
absorb chemical energy
(IX.) The reason carbon-dating works is that: (Chapter 9)
a
plants and animals are such strong emitters of carbon-14
b
after a plant or animal dies, it stops taking in fresh carbon-14
c
there is so much non-radioactive carbon dioxide in the air
d
when plants or animals die, they absorb fresh carbon-14
