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

Neutrons are

Question # 2

The half lie of radium-226 is

Question # 3

The rate of decay of a radioactive substance

Question # 4

The time required for a radioactive material to decrease in active by one half is called

Question # 5

Which are not the elementary particles?

Question # 6

In 1932 Chadwick discovered

Question # 7

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

Question # 8

How much time, theα-particle more massive than an electron

Question # 9

The diameter of an atom is of the order

Question # 10

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

Question # 11

The figure 1.007276μ shows the mass of an:

Question # 12

Neutron was discovered in

Question # 13

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

Question # 14

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

Question # 15

Nucleus of a hydrogen atom may contain:

Question # 16

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 17

Marie curie and Pierre curie discovered:

Question # 18

An alpha particle has a charge of

Question # 19

Radioactivity

Question # 20

Neutron was discovered by

Question # 21

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

Question # 22

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

Question # 23

The number if neutrons in the nucleus of 92U235are

Question # 24

Pair production take place when energy ofγ-rays photon is

Question # 25

The nucleus/nuclei of hydrogen is/are:

Question # 26

A curie represents a very strong source of

Question # 27

How many isotopes of helium are present?

Question # 28

There is present in paraffin a large amount of:

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
2 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
3 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
4 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
5 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
6 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
7 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
8 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
9 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
10 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these

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