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 number if neutrons in the nucleus of 92U235are

Question # 2

Examples of moderators used in a fission reactor is/are:

Question # 3

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 4

Beta particles are

Question # 5

γ-rays behave like a particle because they explain the

Question # 6

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

Question # 7

Heavy water is made of one oxygen atom and two atoms of:

Question # 8

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

Question # 9

The unit of decay constant is

Question # 10

Which are not the elementary particles?

Question # 11

Electrons are

Question # 12

The isotope/s of hydrogen is /are:

Question # 13

Which of the following material has longer half life

Question # 14

The half life of radioactive substances depends upon

Question # 15

Structure of the nucleus was explained by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
2 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
3 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these
4 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A
5 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
6 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
7 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
8 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
9 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
10 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams

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