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

There is present in paraffin a large amount of:

Question # 2

Neutron was suggested to be in the nucleus by:

Question # 3

Neutron was disvovered by:

Question # 4

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 # 5

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 6

An alpha particle has a charge of

Question # 7

Nucleus consists of

Question # 8

A curie represents a very strong source of

Question # 9

A pair of quark and antiquark makes a:

Question # 10

1 amu is equal to.

Question # 11

Phenomenon of radioactivity is due to disintegration of

Question # 12

Nuclei that have the same charge number but different mass number are called

Question # 13

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 14

Alfa particles are

Question # 15

Three quarks make:

Question # 16

How many isotopes of helium are present?

Question # 17

The number of isotopes of hydrogen are

Question # 18

Radioactivity was discovered by:

Question # 19

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 # 20

Mass of neutron is

Question # 21

Mass of proton is

Question # 22

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 23

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

Question # 24

The number if neutrons in the nucleus of 92U235are

Question # 25

The penetration power ofβ-particle is

Question # 26

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

Question # 27

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

Question # 28

The time required for a radioactive material to decrease in active by one half is called

Question # 29

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

Question # 30

1 amu is equal to

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
2 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
3 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
4 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
5 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
6 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
7 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these
8 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
9 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
10 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron

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