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 half life of radioactive substances depends upon

Question # 2

Electrons are

Question # 3

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

Question # 4

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

Question # 5

The chemical properties of all the isotopes of an elements are

Question # 6

The rate of decay of a radioactive substance

Question # 7

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

Question # 8

The unit of decay constant is:

Question # 9

Neutron was disvovered by:

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

An alpha particle has a charge of

Question # 14

The chemical behaviour of an atom is determined by

Question # 15

Alfa particles are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
2 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above
3 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
4 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
5 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
6 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
7 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
8 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
9 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
10 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford

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