MDCAT Physics mcq test with answers for chapter 16 (Nuclear Physics)

Question # 1

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

Decreases A
Increases B
Remain same C
None of the above D

Question # 2

The binding energy per nucleon is:

Greater for heavy nuclei A
Least for heavy nuclei B
Greatest for light nuclei C
Greatest for medium nuclei D

Question # 3

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

increases by one A
Remains same B
Decreases by one C
Decreases by four D

Question # 4

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

5months A
6months B
8months C
7months D

Question # 5

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

A A
W B
Z C
Y D

Question # 6

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

Their smaller energy A
Their smaller mass B
Their smaller density C
Their smaller charge D

Question # 7

Because of large mass when 𝑎 −paricle enters the atom or molecule it:

Moves in zigzag path A
Moves along straight line B
Moves along circular path C
None of these D

Question # 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:

0.8 Curie A
0.1Curie B
0.4 Curie C
0.16 Curie D

Question # 9

During a negative β-decayv

An atomic electron is ejected A
A neutron in the nucleus decays emitting an electron B
An electron which already present within the nucleus is ejected C
A part of binding energy of nuclei is converted into electron D

Question # 10

𝑎, 𝖰 𝒂𝒏𝒅 radiations come out of radioactive substance:

Spontaneously A
When it is put in a reactor B
When it is heated C
Under pressure D

Question # 11

Which row is correct for fission and for fusion?

Produces larger nuclei A
Produces larger nuclei B
Produces smaller nuclei C
Produces smaller nuclei D

Question # 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:

Protons and positrons A
𝛼 −partilces B
neutrons C
Protons and 𝛼 −partilces D

Question # 13

Three quarks make up a:

Leptons A
Mesons B
Baryons C
Quark D

Question # 14

Beta particles have penetration of about:

100 times more than that of the gamma particles A
100 times less than that of an alpha ray B
100 times more than that of an alpha ray C
10 times more than that of an alpha particle D

Question # 15

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

Leptons A
Mesons B
Baryons C
Quarks D

Question # 16

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 :

140days A
45days B
87days C
90days D

Question # 17

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

At high temperature and high pressure A
At high temperature and low pressure B
At low temperature and low pressure C
At low temperature and high pressure D

Question # 18

Which of the following have maximum ionization power?

𝛼 −rays A
𝛽 −rays B
𝛾 −rays C
Same for all D

Question # 19

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:

1.75 days A
3.5 days B
7 days C
14 days D

Question # 20

The phenomenon of radioactivity is associated with:

Fission of nucleus A
Disintegration of neutrons B
Emission of spectral lines C
Spontaneous disintegration of the nuclei of atoms D

Sr.#	Question	Answer
1	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
2	Beta particles have penetration of about:	A. 100 times more than that of the gamma particles B. 100 times less than that of an alpha ray C. 100 times more than that of an alpha ray D. 10 times more than that of an alpha particle
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	The more readily fissionable isotope of uranium has an atomic mass of:	A. 220 B. 230 C. 235 D. 240
5	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
6	𝑎, 𝖰 𝒂𝒏𝒅 radiations come out of radioactive substance:	A. Spontaneously B. When it is put in a reactor C. When it is heated D. Under pressure
7	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
8	In an 𝑎 −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
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 number of electrons in a nucleus X of atomic number Z and mass number A is:	A. A B. W C. Z D. Y

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MDCAT Physics Chapter 16 MCQ Test With Answer for (Nuclear Physics)

MCQ's Test For MDCAT Physics Chapter 16 Nuclear Physics MCQ's Test

MDCAT Physics Chapter 16 Nuclear Physics MCQ's Test

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

The binding energy per nucleon is:

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

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

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

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

Because of large mass when 𝑎 −paricle enters the atom or molecule it:

The activity of a radioactive sample is 1.6 curie and half-life is 2.5 days. Its activity after 10 days will be:

During a negative β-decayv

𝑎, 𝖰 𝒂𝒏𝒅 radiations come out of radioactive substance:

Which row is correct for fission and for fusion?

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:

Three quarks make up a:

Beta particles have penetration of about:

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

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 :

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

Which of the following have maximum ionization power?

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:

The phenomenon of radioactivity is associated with:

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