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 number of electrons in a nucleus X of atomic number Z and mass number A is:

Question # 2

Due to emission of 𝖰+ βˆ’ π’“π’‚π’šπ’”:

Question # 3

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

Question # 4

The uranium Nucleus πŸπŸ‘πŸ– 𝑼 undergoes successive decays, emitting respectively π‘Ž βˆ’ π’“π’‚π’š,𝖰 βˆ’ π’“π’‚π’š 𝒂𝒏𝒅 βˆ’ π’“π’‚π’šπ’”. What is the atomic number and atomic mass of the resulting nucleus:

Question # 5

The most penetrating radiations out of the following is that of

Question # 6

A radioactive nucleus can emit:

Question # 7

The example of nuclear fusion is:

Question # 8

π‘Ž, 𝖰 𝒂𝒏𝒅 radiations come out of radioactive substance:

Question # 9

Half-life of radon gas is:

Question # 10

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

Question # 11

Beta particles have penetration of about:

Question # 12

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

Question # 13

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

Question # 14

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 # 15

In an π‘Ž βˆ’decay:

Question # 16

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

Question # 17

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 # 18

A thorium nucleus is formed when a uranium nucleus emits an π‘Ž βˆ’particles. Atomic number of thorium is :

Question # 19

Which of the following have maximum ionization power?

Question # 20

The fusion of hydrogen into helium is more likely to take place:

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Sr.# Question Answer
1 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
2 Which of the following have maximum ionization power?
A. 𝛼 βˆ’rays
B. 𝛽 βˆ’rays
C. 𝛾 βˆ’rays
D. Same for all
3 Half-life of radon gas is:
A. 1620 years
B. 3.8 days
C. 7 days
D. 11 days
4 The uranium Nucleus πŸπŸ‘πŸ– 𝑼 undergoes successive decays, emitting respectively π‘Ž βˆ’ π’“π’‚π’š,𝖰 βˆ’ π’“π’‚π’š 𝒂𝒏𝒅 βˆ’ π’“π’‚π’šπ’”. What is the atomic number and atomic mass of the resulting nucleus:
A. 90, 238
B. 91, 234
C. 92, 236
D. 92, 238
5 The binding energy per nucleon is:
A. Greater for heavy nuclei
B. Least for heavy nuclei
C. Greatest for light nuclei
D. Greatest for medium nuclei
6 A thorium nucleus is formed when a uranium nucleus emits an π‘Ž βˆ’particles. Atomic number of thorium is :
A. 23
B. 60
C. 90
D. 70
7 Beta particles have penetration of about:
A. 100 times more than that of the gamma particles
B. 100 times less than that of an alpha ray
C. 100 times more than that of an alpha ray
D. 10 times more than that of an alpha particle
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 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:
A. Protons and positrons
B. 𝛼 βˆ’partilces
C. neutrons
D. Protons and 𝛼 βˆ’partilces
10 The phenomenon of radioactivity is associated with:
A. Fission of nucleus
B. Disintegration of neutrons
C. Emission of spectral lines
D. Spontaneous disintegration of the nuclei of atoms
11 If the radioactive substance reduces to 𝟏 πŸπŸ” PHYSICS of its original mass in 40 days then its half-life is:
A. 10days
B. 20days
C. 40days
D. 4days
12 Due to emission of 𝖰+ βˆ’ π’“π’‚π’šπ’”:
A. Mass of the nucleus increases
B. Mass of the nucleus decreases
C. Charge on the nucleus increases
D. Charge number decreases
13 A radioactive substance has a half-life of 4 months. Three-fourths of the substance will decay in:
A. 5months
B. 6months
C. 8months
D. 7months
14 In an π‘Ž βˆ’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
15 The number of electrons in a nucleus X of atomic number Z and mass number A is:
A. A
B. W
C. Z
D. Y
16 A radioactive nucleus can emit:
A. Electron
B. 𝛼 particles
C. Positron
D. Any of these
17 When the radioactive nucleus emits a beta particle, the proton neutron ration:
A. increases by one
B. Remains same
C. Decreases by one
D. Decreases by four
18 When a radioactive nucleus emits a 𝖰 βˆ’paritcles, the mass number of the atom:
A. Increases by one
B. Decreases by one
C. Remains the same
D. Decreases by four
19 The most penetrating radiations out of the following is that of
A. 𝛾-rays
B. Ξ²-rays
C. Ξ±-particles
D. X-rays

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