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

Rate of decay is actually described by.

Question # 2

The chemical behaviour of an atom is determined by

Question # 3

Neon gas have three isotopes whose atomic numbers are

Question # 4

Neutron was discovered in

Question # 5

Which of these is not a radiation detector

Question # 6

The half life of uranium-238 is

Question # 7

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

Question # 8

The isotope/s of hydrogen is /are:

Question # 9

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 10

Neutrons are

Question # 11

The half lie of radium-226 is

Question # 12

The figure 1.007276μ shows the mass of an:

Question # 13

Mass of proton is

Question # 14

Mass of neutron is

Question # 15

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 16

An alpha particle has a charge of

Question # 17

A curie represents a very strong source of

Question # 18

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

Question # 19

Radioactivity was discovered by

Question # 20

Which of the following material has longer half life

Question # 21

β-particles are easily deflected by collisions than heavy

Question # 22

According to Rutherford atomic model, the positive charge in an atom

Question # 23

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

Question # 24

There is present in paraffin a large amount of:

Question # 25

The energy acquired by a mass of 1g moving with the speed of light is

Question # 26

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

Question # 27

Neutron was discovered by

Question # 28

Nucleon means:

Question # 29

U-238 present in the natural uranium is about:

Question # 30

A mass spectrograph sort out

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
2 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
3 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
4 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
5 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
6 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
7 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
8 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
9 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
10 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years

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