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

Radioactivity was discovered by

Question # 2

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

Question # 3

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

Question # 4

The unit of decay constant is

Question # 5

The chemical behaviour of an atom is determined by

Question # 6

Alfa particles are

Question # 7

The energy is found from Einstein's mass energy relation is called

Question # 8

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

Question # 9

The amount of energy equivalent to 1 a.m.u is

Question # 10

Which of the following material has smaller has life

Question # 11

Charge on neutron is

Question # 12

Nucleus of a hydrogen atom may contain:

Question # 13

Binding energy per nucleus is

Question # 14

Which of these is not a radiation detector

Question # 15

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

Question # 16

The isotope/s of hydrogen is /are:

Question # 17

Neutron was disvovered by:

Question # 18

Beta particles are

Question # 19

The rate of decay of radioactive substance

Question # 20

The range of particle depends upon the factor

Question # 21

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

Question # 22

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

Question # 23

Electrons are

Question # 24

The chemical properties of all the isotopes of an elements are

Question # 25

After alpha decay the atomic number of the atom

Question # 26

Marie curie and Pierre curie discovered:

Question # 27

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

Question # 28

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

Question # 29

The rate of decay of a radioactive substance

Question # 30

Radium was discovered by:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
2 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
3 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
4 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
5 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
6 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
7 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
8 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
9 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
10 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron

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