MDCAT Physics Chapter 16 MCQ Test With Answer for (Nuclear Physics)

MCQ's Test For MDCAT Physics Chapter 16 Nuclear Physics MCQ's Test

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MDCAT Physics Chapter 16 Nuclear Physics MCQ's Test

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Question # 1

The half-life of a certain element is 3.5 days at STP. If the temperature is doubled and pressure is reduced to half then half-life of the same element will be:

Question # 2

𝑎, 𝖰 𝒂𝒏𝒅 radiations come out of radioactive substance:

Question # 3

During a negative β-decay

Question # 4

A radioactive isotope 𝟐𝟑𝟖 𝑼 decays consecutively to 𝟐𝟑𝟒 𝑼 the particles emitted are:

Question # 5

In 420 days, the activity of a sample of polonium (Po) fell to one-eight of its initial value. The half-life of polonium is :

Question # 6

The phenomenon of radioactivity is associated with:

Question # 7

In nuclear fission reaction, when the products are 140X and 94Sr, the number of neutrons emitted is

Question # 8

The example of nuclear fusion is:

Question # 9

A thorium nucleus is formed when a uranium nucleus emits an 𝑎 −particles. Atomic number of thorium is :

Question # 10

A count rate 240 per minute reduces to 30 counts per min in 1 hour. The half-life of source is:

Question # 11

The more readily fissionable isotope of uranium has an atomic mass of:

Question # 12

A radioactive substance has a half-life of 4 months. Three-fourths of the substance will decay in:

Question # 13

Half-life of radon gas is:

Question # 14

Due to emission of 𝖰+ − 𝒓𝒂𝒚𝒔:

Question # 15

The most penetrating radiations out of the following is that of

Question # 16

Beta particles have less ionizing power than that of alpha particles because:

Question # 17

Beta particles have penetration of about:

Question # 18

Nuclear fission experiments show that the neutrons the uranium nuclei into two fragment of about the same size. This process is accompanied by the emission of several:

Question # 19

The uranium Nucleus 𝟐𝟑𝟖 𝑼 undergoes successive decays, emitting respectively 𝑎 − 𝒓𝒂𝒚,𝖰 − 𝒓𝒂𝒚 𝒂𝒏𝒅 − 𝒓𝒂𝒚𝒔. What is the atomic number and atomic mass of the resulting nucleus:

Question # 20

Which row is correct for fission and for fusion?

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MCAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Beta particles have less ionizing power than that of alpha particles because:
A. Their smaller energy
B. Their smaller mass
C. Their smaller density
D. Their smaller charge
2 The mother and daughter elements with the emission of 𝖰 − 𝒓𝒂𝒚𝒔, are called:
A. Isotopes
B. Isobars
C. Isomers
D. Isodiapheres
3 When a radioactive nucleus remits a beta particle, the proton neutron ratio:
A. Decreases
B. Increases
C. Remain same
D. None of the above
4 Which row is correct for fission and for fusion?
A. Produces larger nuclei
B. Produces larger nuclei
C. Produces smaller nuclei
D. Produces smaller nuclei
5 Due to emission of 𝖰+ − 𝒓𝒂𝒚𝒔:
A. Mass of the nucleus increases
B. Mass of the nucleus decreases
C. Charge on the nucleus increases
D. Charge number decreases
6 The most penetrating radiations out of the following is that of
A. 𝛾-rays
B. β-rays
C. α-particles
D. X-rays
7 In an 𝑎 −decay:
A. The parent and daughter nuclei have same number of protons
B. The daughter nucleus has one proton more than parent nucleus
C. The daughter nucleus has two protons less than parent nucleus
D. The daughter nucleus has two neutrons more than parent nucleus
8 For atomic nucleus, the binding energy per nucleon with increase in mass number:
A. Increases continuously
B. Remains same
C. Decrease continuously
D. First increases and then decreases with increase in mass number
9 The activity of a radioactive sample is 1.6 curie and half-life is 2.5 days. Its activity after 10 days will be:
A. 0.8 Curie
B. 0.1Curie
C. 0.4 Curie
D. 0.16 Curie
10 A thorium nucleus is formed when a uranium nucleus emits an 𝑎 −particles. Atomic number of thorium is :
A. 23
B. 60
C. 90
D. 70

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