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

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

Question # 2

Rutherford performed an experiment on nuclear reactions in:

Question # 3

The figure 1.007276μ shows the mass of an:

Question # 4

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 # 5

Nucleus of a hydrogen atom may contain:

Question # 6

The rate of decay of a radioactive substance

Question # 7

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

Question # 8

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 9

A mass spectrograph sort out

Question # 10

A pair of quark and antiquark makes a:

Question # 11

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

Question # 12

When certain nucleus emits anα particle, its mass number:

Question # 13

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

Question # 14

The unit of decay constant is

Question # 15

Neutron was suggested to be in the nucleus by:

Question # 16

Proton was discovered by Rutherford in

Question # 17

Binding energy per nucleus is

Question # 18

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 19

γ-rays behave like a particle because they explain the

Question # 20

The range of particle depends upon the factor

Question # 21

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 22

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 23

Pair production take place when energy ofγ-rays photon is

Question # 24

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 25

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 26

Nucleon means:

Question # 27

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

Question # 28

Rate of decay is actually described by.

Question # 29

In radio-active decay, the original element which disintegrate to another element is called

Question # 30

U-238 present in the natural uranium is about:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
2 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
3 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
4 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A
5 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
6 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
7 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements
8 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these
9 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
10 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg

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