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

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

Question # 2

The reciprocal of decay constant λ of a radioactive material is:

Question # 3

Nucleon means:

Question # 4

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

Question # 5

There is present in paraffin a large amount of:

Question # 6

The chemical properties of an element depends upon the number of

Question # 7

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

Question # 8

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

Question # 9

1 amu is equal to

Question # 10

The rate of decay of a radioactive substance

Question # 11

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

Question # 12

Radioactivity was discovered by:

Question # 13

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

Question # 14

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 15

Three quarks make:

Question # 16

The most abundant isotope of neon is

Question # 17

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

Question # 18

The chemical behaviour of an atom is determined by

Question # 19

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

Question # 20

Different radioactive material have

Question # 21

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 22

γ-rays behave like a particle because they explain the

Question # 23

The figure 1.007276μ shows the mass of an:

Question # 24

The diameter of an atom is of the order

Question # 25

Radium was discovered by:

Question # 26

When certain nucleus emits anα particle, its mass number:

Question # 27

How many isotopes of helium are present?

Question # 28

Radioactivity is

Question # 29

Which of the following material has smaller has life

Question # 30

The isotope/s of hydrogen is /are:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
2 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
3 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
4 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
5 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
6 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
7 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
8 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
9 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
10 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei

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