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

U-238 present in the natural uranium is about:

Question # 2

The half life of radioactive substances depends upon

Question # 3

Which of the following material has smaller has life

Question # 4

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

Question # 5

The half life of uranium-238 is

Question # 6

Neutrons are

Question # 7

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

Question # 8

Electrons are

Question # 9

Gamma rays consist of steam of

Question # 10

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

Question # 11

Nucleon means:

Question # 12

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

Question # 13

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

Question # 14

Alfa particles are

Question # 15

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

Question # 16

Charge on neutron is

Question # 17

The figure 1.007276μ shows the mass of an:

Question # 18

How many isotopes of helium are present?

Question # 19

Radioactivity is

Question # 20

Structure of the nucleus was explained by

Question # 21

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

Question # 22

Binding energy per nucleus is

Question # 23

Pair production take place when energy ofγ-rays photon is

Question # 24

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 25

The emission of radiations take place in elements, having charge number greater than

Question # 26

Radioactivity was discovered by

Question # 27

β-particles are easily deflected by collisions than heavy

Question # 28

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

Question # 29

The chemical properties of an element depends upon the number of

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
2 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
3 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
4 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
5 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
6 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
7 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
8 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window
9 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
10 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'

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