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

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Question # 1

Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called

Question # 2

Which of the following material has smaller has life

Question # 3

After alpha decay the atomic number of the atom

Question # 4

The most abundant isotope of neon is

Question # 5

The rate of decay of a radioactive substance

Question # 6

Nucleus of a hydrogen atom may contain:

Question # 7

Radioactivity

Question # 8

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

Question # 9

The emission of radiations take place in elements, having charge number greater than

Question # 10

U-238 present in the natural uranium is about:

Question # 11

β-particles are easily deflected by collisions than heavy

Question # 12

A mass spectrograph sort out

Question # 13

The isotope/s of hydrogen is /are:

Question # 14

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 15

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

Question # 16

Radioactivity is

Question # 17

A pair of quark and antiquark makes a:

Question # 18

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

Question # 19

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

Question # 20

Binding energy per nucleus is

Question # 21

The chemical behaviour of an atom is determined by

Question # 22

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 23

In 1932 Chadwick discovered

Question # 24

The chemical properties of an element depends upon the number of

Question # 25

Mass of neutron is

Question # 26

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

Question # 27

Rate of decay is actually described by.

Question # 28

The range ofβ-particle in air is greater than that ofα-particle by

Question # 29

The number of protons inside a nucleus is called

Question # 30

Pair production take place when energy ofγ-rays photon is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
2 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
3 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
4 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
5 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
6 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
7 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
8 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
9 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
10 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity

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