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

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

Question # 2

During a negative Ξ²-decayv

Question # 3

Which of the following have maximum ionization power?

Question # 4

The example of nuclear fusion is:

Question # 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:

Question # 6

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

Question # 7

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 # 8

The mother and daughter elements with the emission of 𝖰 βˆ’ π’“π’‚π’šπ’”, are called:

Question # 9

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

Question # 10

Which row is correct for fission and for fusion?

Question # 11

A radioactive isotope πŸπŸ‘πŸ– 𝑼 decays consecutively to πŸπŸ‘πŸ’ 𝑼 the particles emitted are:

Question # 12

If the radioactive substance reduces to 𝟏 πŸπŸ” PHYSICS of its original mass in 40 days then its half-life is:

Question # 13

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

Question # 14

During a negative Ξ²-decay

Question # 15

In an π‘Ž βˆ’decay:

Question # 16

The rate of decay radioactive substance:

Question # 17

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

Question # 18

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

Question # 19

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

Question # 20

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

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Sr.# Question Answer
1 A radioactive nucleus can emit:
A. Electron
B. 𝛼 particles
C. Positron
D. Any of these
2 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
3 Which of the following have maximum ionization power?
A. 𝛼 βˆ’rays
B. 𝛽 βˆ’rays
C. 𝛾 βˆ’rays
D. Same for all
4 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
5 The particles equal in mass or greater than mass of protons are called:
A. Leptons
B. Mesons
C. Baryons
D. Quarks
6 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
7 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
8 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
9 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
10 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:
A. 1.75 days
B. 3.5 days
C. 7 days
D. 14 days
11 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
12 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
13 Three quarks make up a:
A. Leptons
B. Mesons
C. Baryons
D. Quark
14 The example of nuclear fusion is:
A. Formation of barium and krypton from uranium
B. Formation of plutonium -235 from uranium -235
C. Formation of helium from hydrogen
D. Formation of water from hydrogen and oxygen
15 The rate of decay radioactive substance:
A. Is constant
B. Decrease exponentially with time
C. Varies inversely with time
D. Decrease linearly with time
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 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 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
19 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

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