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

In an 𝑎 −decay:

Question # 2

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

Question # 3

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

Question # 4

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 # 5

𝑎, 𝖰 𝒂𝒏𝒅 radiations come out of radioactive substance:

Question # 6

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

Question # 7

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

Question # 8

Which of the following have maximum ionization power?

Question # 9

A radioactive nucleus can emit:

Question # 10

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

Question # 11

The half-life of a radioactive element which has only 1//32 of its original mass left after a lapse of 60 days is:

Question # 12

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

Question # 13

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 # 14

Due to emission of 𝖰+ − 𝒓𝒂𝒚𝒔:

Question # 15

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

Question # 16

Half-life of radon gas is:

Question # 17

During a negative β-decay

Question # 18

The example of nuclear fusion is:

Question # 19

For atomic nucleus, the binding energy per nucleon with increase in mass number:

Question # 20

The phenomenon of radioactivity is associated with:

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MCAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 When a radioactive nucleus remits a beta particle, the proton neutron ratio:
A. Decreases
B. Increases
C. Remain same
D. None of the above
2 When a radioactive nucleus emits a 𝖰 −paritcles, the mass number of the atom:
A. Increases by one
B. Decreases by one
C. Remains the same
D. Decreases by four
3 The fusion of hydrogen into helium is more likely to take place:
A. At high temperature and high pressure
B. At high temperature and low pressure
C. At low temperature and low pressure
D. At low temperature and high pressure
4 If the radioactive substance reduces to 𝟏 𝟏𝟔 PHYSICS of its original mass in 40 days then its half-life is:
A. 10days
B. 20days
C. 40days
D. 4days
5 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
6 The mother and daughter elements with the emission of 𝖰 − 𝒓𝒂𝒚𝒔, are called:
A. Isotopes
B. Isobars
C. Isomers
D. Isodiapheres
7 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
8 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
9 Which of the following have maximum ionization power?
A. 𝛼 −rays
B. 𝛽 −rays
C. 𝛾 −rays
D. Same for all
10 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 :
A. 140days
B. 45days
C. 87days
D. 90days

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