ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The 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

Mass of proton is of order of

Question # 2

Beta particles are

Question # 3

In wilson cloud chamber, the air becomes saturated with:

Question # 4

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 5

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

Question # 6

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

Question # 7

Marie curie and Pierre curie discovered:

Question # 8

Nucleon means:

Question # 9

When certain nucleus emits anα particle, its mass number:

Question # 10

Nucleus consists of

Question # 11

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

Question # 12

Which are not the elementary particles?

Question # 13

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

Question # 14

Fraction of the decaying atoms per unit time is called

Question # 15

The total charge of any nucleus is given as

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
2 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above
3 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z
4 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
5 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
6 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
7 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
8 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
9 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
10 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5

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