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

The chemical properties of all the isotopes of an elements are

Question # 2

Rate of decay is actually described by.

Question # 3

Which of these is not a radiation detector

Question # 4

In wilson cloud chamber, the air becomes saturated with:

Question # 5

A mass spectrograph sort out

Question # 6

Neutrons are

Question # 7

There is present in paraffin a large amount of:

Question # 8

The rate of decay of radioactive substance

Question # 9

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

Question # 10

Beta particles are

Question # 11

Three quarks make:

Question # 12

Charge on proton is

Question # 13

Radioactivity

Question # 14

Neutron was suggested to be in the nucleus by:

Question # 15

The emission of radiations take place in elements, having charge number greater than

Question # 16

Radium was discovered by:

Question # 17

The chemical behaviour of an atom is determined by

Question # 18

When certain nucleus emits anα particle, its mass number:

Question # 19

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

Question # 20

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 21

Fraction of the decaying atoms per unit time is called

Question # 22

The half lie of radium-226 is

Question # 23

Radioactivity was discovered by:

Question # 24

Mass of proton is of order of

Question # 25

Pair production take place when energy ofγ-rays photon is

Question # 26

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 27

The penetration power ofβ-particle is

Question # 28

Mass of proton is

Question # 29

The number if neutrons in the nucleus of 92U235are

Question # 30

The rate of decay of a radioactive substance

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
2 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
3 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
4 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
5 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
6 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
7 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these
8 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
9 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
10 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons

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