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

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

Question # 2

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

Question # 3

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 # 4

The phenomenon of radioactivity is associated with:

Question # 5

Which row is correct for fission and for fusion?

Question # 6

The most penetrating radiations out of the following is that of

Question # 7

The uranium Nucleus 𝟐𝟑𝟖 𝑼 undergoes successive decays, emitting respectively 𝑎 − 𝒓𝒂𝒚,𝖰 − 𝒓𝒂𝒚 𝒂𝒏𝒅 − 𝒓𝒂𝒚𝒔. What is the atomic number and atomic mass of the resulting nucleus:

Question # 8

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

Question # 9

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

Question # 10

𝑎, 𝖰 𝒂𝒏𝒅 radiations come out of radioactive substance:

Question # 11

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

Question # 12

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

Question # 13

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 # 14

In an 𝑎 −decay:

Question # 15

The rate of decay radioactive substance:

Question # 16

Beta particles have penetration of about:

Question # 17

The mother and daughter elements with the emission of 𝖰 − 𝒓𝒂𝒚𝒔, are called:

Question # 18

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

Question # 19

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

Question # 20

Three quarks make up a:

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MCAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 A count rate 240 per minute reduces to 30 counts per min in 1 hour. The half-life of source is:
A. 20min
B. 60min
C. 80min
D. 90min
2 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
3 Due to emission of 𝖰+ − 𝒓𝒂𝒚𝒔:
A. Mass of the nucleus increases
B. Mass of the nucleus decreases
C. Charge on the nucleus increases
D. Charge number decreases
4 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
5 A radioactive isotope 𝟐𝟑𝟖 𝑼 decays consecutively to 𝟐𝟑𝟒 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
6 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
7 During a negative β-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
8 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
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 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

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