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

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Question # 1

Three quarks make:

Question # 2

The chemical properties of all the isotopes of an elements are

Question # 3

The chemical properties of an element depends upon the number of

Question # 4

β-particles are easily deflected by collisions than heavy

Question # 5

How many isotopes of helium are present?

Question # 6

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

Question # 7

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

Question # 8

The most abundant isotope of neon is

Question # 9

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

Question # 10

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

Question # 11

Proton was discovered by Rutherford in

Question # 12

The half life of radioactive substances depends upon

Question # 13

The number of isotopes of hydrogen are

Question # 14

Radium was discovered by:

Question # 15

The isotope/s of hydrogen is /are:

Question # 16

The chemical behaviour of an atom is determined by

Question # 17

Radioactivity

Question # 18

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 # 19

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

Question # 20

Charge on proton is

Question # 21

After alpha decay the atomic number of the atom

Question # 22

Binding energy per nucleus is

Question # 23

Charge on neutron is

Question # 24

In 1932 Chadwick discovered

Question # 25

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

Question # 26

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

Question # 27

The number if neutrons in the nucleus of 92U235are

Question # 28

Which of these is not a radiation detector

Question # 29

An alpha particle has a charge of

Question # 30

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

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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 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
3 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
4 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
5 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
6 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
7 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
8 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
9 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these
10 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons

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