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 activity of a radioactive sample is 1.6 curie and half-life is 2.5 days. Its activity after 10 days will be:

Question # 2

The rate of decay radioactive substance:

Question # 3

Due to emission of 𝖰+ − 𝒓𝒂𝒚𝒔:

Question # 4

When the radioactive nucleus emits a beta particle, the proton neutron ration:

Question # 5

The most penetrating radiations out of the following is that of

Question # 6

The mother and daughter elements with the emission of 𝖰 − 𝒓𝒂𝒚𝒔, are called:

Question # 7

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

Question # 8

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 # 9

When a radioactive nucleus emits a 𝖰 −paritcles, the mass number of the atom:

Question # 10

The phenomenon of radioactivity is associated with:

Question # 11

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

Question # 12

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 # 13

The binding energy per nucleon is:

Question # 14

The example of nuclear fusion is:

Question # 15

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

Question # 16

During a negative β-decayv

Question # 17

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 # 18

Three quarks make up a:

Question # 19

During a negative β-decay

Question # 20

Half-life of radon gas is:

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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 most penetrating radiations out of the following is that of
A. 𝛾-rays
B. β-rays
C. α-particles
D. X-rays
3 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
4 A radioactive isotope 𝟐𝟑𝟖 𝑼 decays consecutively to 𝟐𝟑𝟒 𝑼 the particles emitted are:
A. One 𝛼 and one 𝛽
B. Two 𝛼 and one 𝛽
C. e 𝛼 and two 𝛽
D. Two 𝛼 and two 𝛽
5 A radioactive nucleus can emit:
A. Electron
B. 𝛼 particles
C. Positron
D. Any of these
6 Three quarks make up a:
A. Leptons
B. Mesons
C. Baryons
D. Quark
7 When a radioactive nucleus remits a beta particle, the proton neutron ratio:
A. Decreases
B. Increases
C. Remain same
D. None of the above
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 rate of decay radioactive substance:
A. Is constant
B. Decrease exponentially with time
C. Varies inversely with time
D. Decrease linearly with time
10 In nuclear fission reaction, when the products are 140X and 94Sr, the number of neutrons emitted is
A. 1
B. 2
C. 5
D. 9

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