ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

Different radioactive material have

Question # 2

Three quarks make:

Question # 3

U-238 present in the natural uranium is about:

Question # 4

Which of these is not a radiation detector

Question # 5

Binding energy per nucleus is

Question # 6

Gamma rays consist of steam of

Question # 7

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

Question # 8

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

Question # 9

Fraction of the decaying atoms per unit time is called

Question # 10

When certain nucleus emits anα particle, its mass number:

Question # 11

Rate of decay is actually described by.

Question # 12

The number if neutrons in the nucleus of 92U235are

Question # 13

How many isotopes of helium are present?

Question # 14

The range of particle depends upon the factor

Question # 15

The half lie of radium-226 is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
2 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
3 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
4 In radioactive decay, the new element which is formed due to the disintegration of original element is called
A. element
B. daughter element
C. parent element
D. none of these
5 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
6 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
7 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
8 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
9 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
10 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

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