ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

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

The nucleus left after the emission of some radiation is called:

Question # 2

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 3

Phenomenon of radioactivity is due to disintegration of

Question # 4

Nuclei that have the same charge number but different mass number are called

Question # 5

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

Question # 6

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 7

The chemical properties of an element depends upon the number of

Question # 8

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 9

Nucleus of a hydrogen atom may contain:

Question # 10

A pair of quark and antiquark makes a:

Question # 11

The half life of radioactive substances depends upon

Question # 12

Mass of neutron is

Question # 13

Rutherford performed an experiment on nuclear reactions in:

Question # 14

Which are not the elementary particles?

Question # 15

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 16

Which of these is not a radiation detector

Question # 17

The energy acquired by a mass of 1g moving with the speed of light is

Question # 18

A mass spectrograph sort out

Question # 19

Radium was discovered by:

Question # 20

In wilson cloud chamber, the air becomes saturated with:

Question # 21

Mass of proton is of order of

Question # 22

Binding energy per nucleus is

Question # 23

When certain nucleus emits aβ-particles, is mass number:

Question # 24

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 25

The diameter of an atom is of the order

Question # 26

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

Question # 27

Radioactivity was discovered by

Question # 28

Three quarks make:

Question # 29

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 30

The figure 1.007276μ shows the mass of an:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
2 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
3 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
4 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
5 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
6 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
7 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
8 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
9 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
10 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000

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