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

Structure of the nucleus was explained by

Question # 2

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

Question # 3

Neutron was suggested to be in the nucleus by:

Question # 4

Phenomenon of radioactivity is due to disintegration of

Question # 5

Heavy water is made of one oxygen atom and two atoms of:

Question # 6

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

Question # 7

Neon gas have three isotopes whose atomic numbers are

Question # 8

Nucleus of a hydrogen atom may contain:

Question # 9

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 # 10

A mass spectrograph sort out

Question # 11

Neutron was discovered by

Question # 12

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

Question # 13

Radiation detector are used to

Question # 14

Nucleus consists of

Question # 15

When a nucleus emits an alpha particles, its charge number decreases by

Question # 16

In wilson cloud chamber, the air becomes saturated with:

Question # 17

The number of protons inside a nucleus is called

Question # 18

The number of all the protons and neutrons in a nucleus is known as

Question # 19

The half life of radioactive substances depends upon

Question # 20

Marie curie and Pierre curie discovered:

Question # 21

The figure 1.007276μ shows the mass of an:

Question # 22

The nucleus/nuclei of hydrogen is/are:

Question # 23

The total charge of any nucleus is given as

Question # 24

γ-rays are

Question # 25

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 26

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

Question # 27

How many isotopes of helium are present?

Question # 28

The number of isotopes of hydrogen are

Question # 29

Rutherford performed an experiment on nuclear reactions in:

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
2 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
3 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
4 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
5 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
6 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
7 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
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 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
10 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these

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