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

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

Question # 2

Three quarks make:

Question # 3

For Protium, the mass defect is:

Question # 4

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

Question # 5

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 6

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

Question # 7

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

Question # 8

Phenomenon of radioactivity is due to disintegration of

Question # 9

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

Question # 10

After alpha decay the atomic number of the atom

Question # 11

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

Question # 12

Which of the following material has smaller has life

Question # 13

There is present in paraffin a large amount of:

Question # 14

The chemical behaviour of an atom is determined by

Question # 15

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

Question # 16

The unit of decay constant is:

Question # 17

In wilson cloud chamber, the air becomes saturated with:

Question # 18

Proton was discovered by Rutherford in

Question # 19

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 20

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 21

Neutron was suggested to be in the nucleus by:

Question # 22

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

Question # 23

U-238 present in the natural uranium is about:

Question # 24

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

Question # 25

The number of protons inside a nucleus is called

Question # 26

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

Question # 27

A curie represents a very strong source of

Question # 28

In radio-active decay, the original element which disintegrate to another element is called

Question # 29

Fraction of the decaying atoms per unit time is called

Question # 30

The nucleus/nuclei of hydrogen is/are:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
2 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
3 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
4 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
5 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
6 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
7 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
8 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
9 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
10 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52

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