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

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

Question # 2

Binding energy per nucleus is

Question # 3

The penetration power ofβ-particle is

Question # 4

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

Question # 5

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

Question # 6

Which of these is not a radiation detector

Question # 7

Mass of proton is

Question # 8

How many isotopes of helium are present?

Question # 9

The range ofβ-particle in air is greater than that ofα-particle by

Question # 10

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 11

Rate of decay is actually described by.

Question # 12

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

Question # 13

The chemical properties of an element depends upon the number of

Question # 14

β-particles are easily deflected by collisions than heavy

Question # 15

How much time, theα-particle more massive than an electron

Question # 16

Charge on proton is

Question # 17

There is present in paraffin a large amount of:

Question # 18

The rate of decay of a radioactive substance

Question # 19

The half life of radioactive substances depends upon

Question # 20

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

Question # 21

Different radioactive material have

Question # 22

Proton was discovered by Rutherford in

Question # 23

Mass of proton is of order of

Question # 24

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

Question # 25

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

Question # 26

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 27

A mass spectrograph sort out

Question # 28

The unit of decay constant is

Question # 29

Alfa particles are

Question # 30

Radium was discovered by:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A
2 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
3 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
4 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
5 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
6 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
7 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
8 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
9 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
10 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

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