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

Neutron was suggested to be in the nucleus by:

Question # 2

A mass spectrograph sort out

Question # 3

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

Question # 4

The diameter of an atom is of the order

Question # 5

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

Question # 6

The isotope/s of hydrogen is /are:

Question # 7

Structure of the nucleus was explained by

Question # 8

The unit of decay constant is:

Question # 9

Binding energy per nucleus is

Question # 10

Gamma rays consist of steam of

Question # 11

Different radioactive material have

Question # 12

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 13

Neutron was discovered in

Question # 14

Which of the following material has longer half life

Question # 15

When certain nucleus emits aβ-particles, is mass number:

Question # 16

A pair of quark and antiquark makes a:

Question # 17

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

Question # 18

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

Question # 19

Heavy water is made of one oxygen atom and two atoms of:

Question # 20

1 amu is equal to

Question # 21

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

Question # 22

Mass of proton is

Question # 23

The chemical properties of all the isotopes of an elements are

Question # 24

Nucleus consists of

Question # 25

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

Question # 26

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

Question # 27

The figure 1.007276μ shows the mass of an:

Question # 28

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

Question # 29

The rate of decay of radioactive substance

Question # 30

The number of isotopes of hydrogen are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
2 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
3 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these
4 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A
5 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
6 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
7 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
8 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
9 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
10 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

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