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

During a negative Ξ²-decayv

Question # 2

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

Question # 3

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

Question # 4

Which of the following have maximum ionization power?

Question # 5

The phenomenon of radioactivity is associated with:

Question # 6

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

Question # 7

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

Question # 8

A radioactive nucleus can emit:

Question # 9

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

Question # 10

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

Question # 11

The example of nuclear fusion is:

Question # 12

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 # 13

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

Question # 14

The binding energy per nucleon is:

Question # 15

Half-life of radon gas is:

Question # 16

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

Question # 17

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

Question # 18

During a negative Ξ²-decay

Question # 19

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

Question # 20

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

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Sr.# Question Answer
1 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
2 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
3 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
4 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
5 A radioactive nucleus can emit:
A. Electron
B. 𝛼 particles
C. Positron
D. Any of these
6 The more readily fissionable isotope of uranium has an atomic mass of:
A. 220
B. 230
C. 235
D. 240
7 A radioactive isotope πŸπŸ‘πŸ– 𝑼 decays consecutively to πŸπŸ‘πŸ’ 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
8 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
9 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
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
11 Because of large mass when π‘Ž βˆ’paricle enters the atom or molecule it:
A. Moves in zigzag path
B. Moves along straight line
C. Moves along circular path
D. None of these
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 When a radioactive nucleus remits a beta particle, the proton neutron ratio:
A. Decreases
B. Increases
C. Remain same
D. None of the above
14 Which of the following have maximum ionization power?
A. 𝛼 βˆ’rays
B. 𝛽 βˆ’rays
C. 𝛾 βˆ’rays
D. Same for all
15 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
16 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
17 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
18 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
19 Half-life of radon gas is:
A. 1620 years
B. 3.8 days
C. 7 days
D. 11 days

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