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

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

Question # 2

The nucleus/nuclei of hydrogen is/are:

Question # 3

Pair production take place when energy ofγ-rays photon is

Question # 4

The figure 1.007276μ shows the mass of an:

Question # 5

γ-rays behave like a particle because they explain the

Question # 6

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

Question # 7

The penetration power ofβ-particle is

Question # 8

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

Question # 9

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

Question # 10

The chemical behaviour of an atom is determined by

Question # 11

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 12

Nucleon means:

Question # 13

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

Question # 14

Neutron was discovered in

Question # 15

Radiation detector are used to

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
2 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
3 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements
4 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
5 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
6 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
7 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
8 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
9 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
10 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only

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