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

1 amu is equal to.

Question # 2

The number if neutrons in the nucleus of 92U235are

Question # 3

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

Question # 4

The nucleus/nuclei of hydrogen is/are:

Question # 5

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

Question # 6

Radioactivity was discovered by

Question # 7

Mass of proton is of order of

Question # 8

Neutron was suggested to be in the nucleus by:

Question # 9

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

Question # 10

Which of the following material has longer half life

Question # 11

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

Question # 12

γ-rays are

Question # 13

A pair of quark and antiquark makes a:

Question # 14

The rate of decay of a radioactive substance

Question # 15

Nucleus of a hydrogen atom may contain:

Question # 16

A curie represents a very strong source of

Question # 17

U-238 present in the natural uranium is about:

Question # 18

The number of protons inside a nucleus is called

Question # 19

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

Question # 20

Marie curie and Pierre curie discovered:

Question # 21

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

Question # 22

Radioactivity was discovered by:

Question # 23

Radium was discovered by:

Question # 24

Neutron was discovered by

Question # 25

Which are not the elementary particles?

Question # 26

The figure 1.007276μ shows the mass of an:

Question # 27

The isotope/s of hydrogen is /are:

Question # 28

There is present in paraffin a large amount of:

Question # 29

The most abundant isotope of neon is

Question # 30

The penetration power ofβ-particle is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
2 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
3 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
4 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
5 In radioactive decay, the new element which is formed due to the disintegration of original element is called
A. element
B. daughter element
C. parent element
D. none of these
6 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
7 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
8 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
9 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
10 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932

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