ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

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

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

Question # 2

Binding energy per nucleus is

Question # 3

Rutherford performed an experiment on nuclear reactions in:

Question # 4

There is present in paraffin a large amount of:

Question # 5

The nucleus/nuclei of hydrogen is/are:

Question # 6

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

Question # 7

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 8

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

Question # 9

Structure of the nucleus was explained by

Question # 10

1 amu is equal to.

Question # 11

The counter, which also provides the power to the G.M. tube is called:

Question # 12

The half life of uranium-238 is

Question # 13

For Protium, the mass defect is:

Question # 14

Mass of proton is

Question # 15

Which of the following material has smaller has life

Question # 16

Beta particles are

Question # 17

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

Question # 18

Radium was discovered by:

Question # 19

Neutrons are

Question # 20

The chemical behaviour of an atom is determined by

Question # 21

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

Question # 22

Pair production take place when energy ofγ-rays photon is

Question # 23

Mass of neutron is

Question # 24

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

Question # 25

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 # 26

The diameter of an atom is of the order

Question # 27

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

Question # 28

The chemical properties of all the isotopes of an elements are

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
2 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
3 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
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 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
6 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
7 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
8 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
9 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
10 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements

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