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

Nucleus of a hydrogen atom may contain:

Question # 2

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

Question # 3

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

Question # 4

In wilson cloud chamber, the air becomes saturated with:

Question # 5

1 amu is equal to.

Question # 6

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

Question # 7

Three quarks make:

Question # 8

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

Question # 9

Nucleus consists of

Question # 10

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 11

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

Question # 12

γ-rays are

Question # 13

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 14

How many isotopes of helium are present?

Question # 15

After alpha decay the atomic number of the atom

Question # 16

The unit of decay constant is:

Question # 17

Radioactivity was discovered by:

Question # 18

Curie is a unit of

Question # 19

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

Question # 20

The penetration power ofβ-particle is

Question # 21

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

Question # 22

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

Question # 23

An alpha particle has a charge of

Question # 24

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

Question # 25

Which of the following material has smaller has life

Question # 26

Neon gas have three isotopes whose atomic numbers are

Question # 27

Charge on neutron is

Question # 28

In 1932 Chadwick discovered

Question # 29

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

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 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window
2 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
3 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
4 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
5 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
6 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
7 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
8 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
9 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg
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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