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

There is present in paraffin a large amount of:

Question # 2

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 3

The range ofβ-particle in air is greater than that ofα-particle by

Question # 4

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 # 5

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

Question # 6

When a nucleus emits an alpha particles, its charge number decreases by

Question # 7

Radioactivity was discovered by

Question # 8

Radium was discovered by:

Question # 9

When certain nucleus emits aβ-particles, is mass number:

Question # 10

How many isotopes of helium are present?

Question # 11

The chemical behaviour of an atom is determined by

Question # 12

The half lie of radium-226 is

Question # 13

Nucleon means:

Question # 14

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

Question # 15

The nucleus left after the emission of some radiation is called:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg
2 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
3 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
4 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
5 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
6 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
7 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
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 amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
10 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000

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