ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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Question # 1

Mass of proton is

Question # 2

Rate of decay is actually described by.

Question # 3

When certain nucleus emits anα particle, its mass number:

Question # 4

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

Question # 5

Phenomenon of radioactivity is due to disintegration of

Question # 6

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 7

Nucleon means:

Question # 8

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

Question # 9

The figure 1.007276μ shows the mass of an:

Question # 10

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

Question # 11

Proton was discovered by Rutherford in

Question # 12

Which are not the elementary particles?

Question # 13

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 # 14

Neutron was discovered in

Question # 15

Radium was discovered by:

Question # 16

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

Question # 17

The diameter of an atom is of the order

Question # 18

β-particles are easily deflected by collisions than heavy

Question # 19

Neon gas have three isotopes whose atomic numbers are

Question # 20

Binding energy per nucleus is

Question # 21

The most abundant isotope of neon is

Question # 22

Structure of the nucleus was explained by

Question # 23

Mass of proton is of order of

Question # 24

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

Question # 25

U-238 present in the natural uranium is about:

Question # 26

Different radioactive material have

Question # 27

The chemical properties of an element depends upon the number of

Question # 28

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

Question # 29

The half life of radioactive substances depends upon

Question # 30

The half life of uranium-238 is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
4 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
5 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
6 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
7 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
8 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
9 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
10 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time

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