ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Physics ECAT Pre Engineering 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

Binding energy per nucleus is

Question # 3

Charge on neutron is

Question # 4

Nucleus of a hydrogen atom may contain:

Question # 5

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 6

Rate of decay is actually described by.

Question # 7

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

Question # 8

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 9

Radioactivity was discovered by

Question # 10

Radioactivity

Question # 11

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

Question # 12

The chemical behaviour of an atom is determined by

Question # 13

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 14

The number if neutrons in the nucleus of 92U235are

Question # 15

The figure 1.007276μ shows the mass of an:

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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 electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A
2 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
3 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
4 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
5 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
6 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
7 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
8 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
9 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
10 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these

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