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

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

Question # 2

1 amu is equal to

Question # 3

Neutron was discovered in

Question # 4

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

Question # 5

The number of isotopes of hydrogen are

Question # 6

Radioactivity was discovered by:

Question # 7

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 8

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

Question # 9

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

Question # 10

A mass spectrograph sort out

Question # 11

1 amu is equal to.

Question # 12

The unit of decay constant is

Question # 13

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

Question # 14

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

Question # 15

The diameter of an atom is of the order

Question # 16

The rate of decay of a radioactive substance

Question # 17

Which of the following material has longer half life

Question # 18

The half life of radioactive substances depends upon

Question # 19

The number of protons inside a nucleus is called

Question # 20

Which of these is not a radiation detector

Question # 21

There is present in paraffin a large amount of:

Question # 22

Curie is a unit of

Question # 23

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

Question # 24

Radiation detector are used to

Question # 25

A curie represents a very strong source of

Question # 26

Radioactivity is

Question # 27

How many isotopes of helium are present?

Question # 28

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 29

Marie curie and Pierre curie discovered:

Question # 30

The most abundant isotope of neon is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
2 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
3 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
4 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
5 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
6 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
7 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
8 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
9 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above
10 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these

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