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

The most abundant isotope of neon is

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

The penetration power ofβ-particle is

Question # 6

Neon gas have three isotopes whose atomic numbers are

Question # 7

U-238 present in the natural uranium is about:

Question # 8

Mass of neutron is

Question # 9

Radioactivity was discovered by

Question # 10

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 11

Neutron was disvovered by:

Question # 12

Radioactivity

Question # 13

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

Question # 14

The diameter of an atom is of the order

Question # 15

γ-rays are

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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 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
3 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
4 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
5 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
6 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
7 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
8 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
9 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
10 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life

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