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

The isotope/s of hydrogen is /are:

Question # 2

Which of the following material has longer half life

Question # 3

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

Question # 4

Pair production take place when energy ofγ-rays photon is

Question # 5

The figure 1.007276μ shows the mass of an:

Question # 6

The rate of decay of a radioactive substance

Question # 7

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

Question # 8

Mass of proton is of order of

Question # 9

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

Question # 10

A pair of quark and antiquark makes a:

Question # 11

Marie curie and Pierre curie discovered:

Question # 12

Mass of neutron is

Question # 13

Gamma rays consist of steam of

Question # 14

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 15

Phenomenon of radioactivity is due to disintegration of

Question # 16

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

Question # 17

The number if neutrons in the nucleus of 92U235are

Question # 18

γ-rays behave like a particle because they explain the

Question # 19

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

Question # 20

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

Question # 21

Rate of decay is actually described by.

Question # 22

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 23

Beta particles are

Question # 24

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

Question # 25

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

Question # 26

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

Question # 27

Fraction of the decaying atoms per unit time is called

Question # 28

Nucleus consists of

Question # 29

Radioactivity was discovered by:

Question # 30

For Protium, the mass defect is:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
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 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
4 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
5 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
6 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
7 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
8 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
9 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
10 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral

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