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

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 3

Neutron was disvovered by:

Question # 4

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

Question # 5

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 6

The counter, which also provides the power to the G.M. tube is called:

Question # 7

Marie curie and Pierre curie discovered:

Question # 8

The half life of uranium-238 is

Question # 9

The penetration power ofβ-particle is

Question # 10

Which are not the elementary particles?

Question # 11

In wilson cloud chamber, the air becomes saturated with:

Question # 12

After alpha decay the atomic number of the atom

Question # 13

When certain nucleus emits anα particle, its mass number:

Question # 14

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

Question # 15

Alfa particles are

Question # 16

A mass spectrograph sort out

Question # 17

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

Question # 18

Nuclei that have the same charge number but different mass number are called

Question # 19

Radioactivity

Question # 20

Beta particles are

Question # 21

Nucleon means:

Question # 22

Fraction of the decaying atoms per unit time is called

Question # 23

The figure 1.007276μ shows the mass of an:

Question # 24

Which of the following material has longer half life

Question # 25

Rate of decay is actually described by.

Question # 26

The unit of decay constant is

Question # 27

Curie is a unit of

Question # 28

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

Question # 29

Electrons are

Question # 30

The unit of decay constant is:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
2 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
3 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
4 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
5 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
6 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
7 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
8 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
9 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
10 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1

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