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

A curie represents a very strong source of

Question # 2

Proton was discovered by Rutherford in

Question # 3

1 amu is equal to.

Question # 4

The reciprocal of decay constant λ of a radioactive material is:

Question # 5

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 6

There is present in paraffin a large amount of:

Question # 7

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

Question # 8

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 # 9

The chemical properties of all the isotopes of an elements are

Question # 10

The unit of decay constant is:

Question # 11

Neon gas have three isotopes whose atomic numbers are

Question # 12

A pair of quark and antiquark makes a:

Question # 13

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

Question # 14

Mass of neutron is

Question # 15

The distance travelled byα-particle in a medium before coming to rest, is called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
2 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
3 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
4 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
5 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
6 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
7 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
8 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
9 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
10 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium

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