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

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

Question # 2

The chemical properties of all the isotopes of an elements are

Question # 3

Charge on proton is

Question # 4

γ-rays are

Question # 5

A curie represents a very strong source of

Question # 6

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

Question # 7

The rate of decay of radioactive substance

Question # 8

The nucleus/nuclei of hydrogen is/are:

Question # 9

A mass spectrograph sort out

Question # 10

Marie curie and Pierre curie discovered:

Question # 11

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

Question # 12

Charge on neutron is

Question # 13

Binding energy per nucleus is

Question # 14

Mass of neutron is

Question # 15

β-particles are easily deflected by collisions than heavy

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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 number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z
2 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
3 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
4 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
5 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
6 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
7 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
8 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
9 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time
10 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four

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