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

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

Question # 3

During a negative Ξ²-decayv

Question # 4

Half-life of radon gas is:

Question # 5

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

Question # 6

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

Question # 7

The phenomenon of radioactivity is associated with:

Question # 8

In an π‘Ž βˆ’decay:

Question # 9

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

Question # 10

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

Question # 11

Because of large mass when π‘Ž βˆ’paricle enters the atom or molecule it:

Question # 12

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

Question # 13

The example of nuclear fusion is:

Question # 14

Beta particles have penetration of about:

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

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 # 20

Which of the following have maximum ionization power?

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Sr.# Question Answer
1 The more readily fissionable isotope of uranium has an atomic mass of:
A. 220
B. 230
C. 235
D. 240
2 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
3 During a negative Ξ²-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
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 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
6 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
7 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
8 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
9 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
10 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
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:
A. 12days
B. 10days
C. 22days
D. 36days
12 The rate of decay radioactive substance:
A. Is constant
B. Decrease exponentially with time
C. Varies inversely with time
D. Decrease linearly with time
13 Half-life of radon gas is:
A. 1620 years
B. 3.8 days
C. 7 days
D. 11 days
14 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
15 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
16 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
17 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
18 During a negative Ξ²-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
19 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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