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

00:00
Question # 1

A pair of quark and antiquark makes a:

Question # 2

Nucleus consists of

Question # 3

There is present in paraffin a large amount of:

Question # 4

γ-rays behave like a particle because they explain the

Question # 5

The figure 1.007276μ shows the mass of an:

Question # 6

The chemical behaviour of an atom is determined by

Question # 7

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

Question # 8

Radioactivity was discovered by:

Question # 9

Rate of decay is actually described by.

Question # 10

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

Question # 11

Neutron was disvovered by:

Question # 12

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

Question # 13

Neutron was suggested to be in the nucleus by:

Question # 14

The range of particle depends upon the factor

Question # 15

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

Question # 16

Radioactivity is

Question # 17

Radium was discovered by:

Question # 18

Charge on proton is

Question # 19

The total charge of any nucleus is given as

Question # 20

Rutherford performed an experiment on nuclear reactions in:

Question # 21

Nucleon means:

Question # 22

The unit of decay constant is:

Question # 23

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 24

Neon gas have three isotopes whose atomic numbers are

Question # 25

Radiation detector are used to

Question # 26

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

Question # 27

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 28

A particle having the mass of electron and charge of a proton is called a

Question # 29

The rate of decay of radioactive substance

Question # 30

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
2 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
3 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
4 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
5 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
6 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
7 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
8 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
9 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
10 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these

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