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

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

Question # 2

U-238 present in the natural uranium is about:

Question # 3

Which of the following material has smaller has life

Question # 4

When certain nucleus emits anα particle, its mass number:

Question # 5

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

Question # 6

A pair of quark and antiquark makes a:

Question # 7

Neutron was discovered in

Question # 8

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

Question # 9

The number of protons inside a nucleus is called

Question # 10

In radio-active decay, the original element which disintegrate to another element is called

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

Nucleus consists of

Question # 15

The rate of decay of a radioactive substance

Question # 16

Mass of neutron is

Question # 17

The half life of uranium-238 is

Question # 18

The range of particle depends upon the factor

Question # 19

Pair production take place when energy ofγ-rays photon is

Question # 20

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

Question # 21

Neutrons are

Question # 22

Radioactivity is

Question # 23

The chemical properties of all the isotopes of an elements are

Question # 24

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

Question # 25

Marie curie and Pierre curie discovered:

Question # 26

The figure 1.007276μ shows the mass of an:

Question # 27

Fraction of the decaying atoms per unit time is called

Question # 28

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

Question # 29

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 30

In 1932 Chadwick discovered

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
2 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
3 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
4 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above
5 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
6 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
7 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
8 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
9 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
10 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric

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