ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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ECAT Pre General Science Physics Chapter 21 Nuclear Physics

00:00
Question # 1

Which are not the elementary particles?

Question # 2

The diameter of an atom is of the order

Question # 3

Rate of decay is actually described by.

Question # 4

Radioactivity was discovered by:

Question # 5

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 6

The nucleus/nuclei of hydrogen is/are:

Question # 7

A mass spectrograph sort out

Question # 8

The total charge of any nucleus is given as

Question # 9

Three quarks make:

Question # 10

In 1932 Chadwick discovered

Question # 11

The unit of decay constant is:

Question # 12

Examples of moderators used in a fission reactor is/are:

Question # 13

The reciprocal of decay constant λ of a radioactive material is:

Question # 14

γ-rays behave like a particle because they explain the

Question # 15

Mass of proton is of order of

Question # 16

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 17

Neon gas have three isotopes whose atomic numbers are

Question # 18

The chemical behaviour of an atom is determined by

Question # 19

The number of protons inside a nucleus is called

Question # 20

Neutron was discovered by

Question # 21

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 22

For Protium, the mass defect is:

Question # 23

The counter, which also provides the power to the G.M. tube is called:

Question # 24

Neutron was suggested to be in the nucleus by:

Question # 25

Neutron was discovered in

Question # 26

The energy is found from Einstein's mass energy relation is called

Question # 27

The figure 1.007276μ shows the mass of an:

Question # 28

The most abundant isotope of neon is

Question # 29

γ-rays are

Question # 30

Phenomenon of radioactivity is due to disintegration of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
2 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
3 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
4 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
5 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
6 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
7 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
8 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
9 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
10 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four

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