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

Electrons are

Question # 2

Radium was discovered by:

Question # 3

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

Question # 4

Neutron was disvovered by:

Question # 5

Proton was discovered by Rutherford in

Question # 6

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

Question # 7

A pair of quark and antiquark makes a:

Question # 8

The unit of decay constant is:

Question # 9

Three quarks make:

Question # 10

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

Question # 11

A particle having the mass of electron and charge of a proton is called a

Question # 12

Alfa particles are

Question # 13

The half life of radioactive substances depends upon

Question # 14

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 # 15

Binding energy per nucleus is

Question # 16

The half life of uranium-238 is

Question # 17

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 18

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

Question # 19

Charge on neutron is

Question # 20

In 1932 Chadwick discovered

Question # 21

Radioactivity was discovered by:

Question # 22

A curie represents a very strong source of

Question # 23

The isotope/s of hydrogen is /are:

Question # 24

Nucleus of a hydrogen atom may contain:

Question # 25

The chemical properties of an element depends upon the number of

Question # 26

Which of these is not a radiation detector

Question # 27

A mass spectrograph sort out

Question # 28

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

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
2 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
3 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
4 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
5 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
6 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
7 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
8 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
9 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
10 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford

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