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 phenomenon of radioactivity is associated with:

Question # 2

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

Question # 3

The rate of decay radioactive substance:

Question # 4

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

Question # 5

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 # 6

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 # 7

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

Question # 8

The example of nuclear fusion is:

Question # 9

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

Question # 10

Which row is correct for fission and for fusion?

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

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 # 16

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

Question # 17

𝑎, 𝖰 𝒂𝒏𝒅 radiations come out of radioactive substance:

Question # 18

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

Question # 19

Which of the following have maximum ionization power?

Question # 20

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

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MCAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The rate of decay radioactive substance:
A. Is constant
B. Decrease exponentially with time
C. Varies inversely with time
D. Decrease linearly with time
2 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
3 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
4 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
5 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
6 Half-life of radon gas is:
A. 1620 years
B. 3.8 days
C. 7 days
D. 11 days
7 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
8 The mother and daughter elements with the emission of 𝖰 − 𝒓𝒂𝒚𝒔, are called:
A. Isotopes
B. Isobars
C. Isomers
D. Isodiapheres
9 The more readily fissionable isotope of uranium has an atomic mass of:
A. 220
B. 230
C. 235
D. 240
10 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

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