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

Because of large mass when 𝑎 −paricle enters the atom or molecule it:

Question # 2

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

Question # 3

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 # 4

The most penetrating radiations out of the following is that of

Question # 5

Which of the following have maximum ionization power?

Question # 6

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

Question # 7

When a radioactive nucleus remits a beta particle, the proton neutron ratio:

Question # 8

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

Question # 9

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

Question # 10

Due to emission of 𝖰+ − 𝒓𝒂𝒚𝒔:

Question # 11

The particles equal in mass or greater than mass of protons are called:

Question # 12

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

Question # 13

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 # 14

Half-life of radon gas is:

Question # 15

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 # 16

Which row is correct for fission and for fusion?

Question # 17

A radioactive nucleus can emit:

Question # 18

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

Question # 19

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

Question # 20

In an 𝑎 −decay:

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MCAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 During a negative β-decay
A. An atomic electron is ejected
B. A neutron in the nucleus decays emitting an electron
C. An electron which already present within the nucleus is ejected
D. A part of binding energy of nuclei is converted into electron
2 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
3 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
4 The mother and daughter elements with the emission of 𝖰 − 𝒓𝒂𝒚𝒔, are called:
A. Isotopes
B. Isobars
C. Isomers
D. Isodiapheres
5 The half-life of a radioactive element which has only 1//32 of its original mass left after a lapse of 60 days is:
A. 12days
B. 10days
C. 22days
D. 36days
6 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
7 The rate of decay radioactive substance:
A. Is constant
B. Decrease exponentially with time
C. Varies inversely with time
D. Decrease linearly with time
8 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
9 Which of the following have maximum ionization power?
A. 𝛼 −rays
B. 𝛽 −rays
C. 𝛾 −rays
D. Same for all
10 During a negative β-decayv
A. An atomic electron is ejected
B. A neutron in the nucleus decays emitting an electron
C. An electron which already present within the nucleus is ejected
D. A part of binding energy of nuclei is converted into electron

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