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

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 2

A pair of quark and antiquark makes a:

Question # 3

Which of the following material has longer half life

Question # 4

Structure of the nucleus was explained by

Question # 5

Three quarks make:

Question # 6

Which of the following material has smaller has life

Question # 7

Rutherford performed an experiment on nuclear reactions in:

Question # 8

A curie represents a very strong source of

Question # 9

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

Question # 10

β-particles are easily deflected by collisions than heavy

Question # 11

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

Question # 12

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 13

Fraction of the decaying atoms per unit time is called

Question # 14

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

Question # 15

The chemical behaviour of an atom is determined by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C
2 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
3 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
4 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
5 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
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 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
8 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
9 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
10 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars

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