More Classes
5th Class
6th Class
7th Class
8th Class
9th Class
10th Class
11th Class
12th Class
NAT I
NAT II
CSS
IQ
General Knowledge
MDCAT
ECAT
GAT General
GAT Subject
Other Links
Go to Home
Online Tests
ECAT Pre General Science Physics Chapter 21 Nuclear Physics Online Test MCQs With Answers
Question # 1
When a charged particle passes through matter, it produces ionization, this effect is used in
Choose an answer
fission reaction
reactor
radiation detector
fusion reaction
Previous
Skip
Next
Question # 2
U-238 present in the natural uranium is about:
Choose an answer
59%
0.007%
99%
39%
19%
Previous
Skip
Next
Question # 3
The chemical properties of an element depends upon the number of
Choose an answer
electron
position
photons
neutrons
Previous
Skip
Next
Question # 4
Which of these is not a radiation detector
Choose an answer
Wilson cloud chamber
cyclotron acceleration
Geiger Miller counter
solid state detector
Previous
Skip
Next
Question # 5
Which of the following material has longer half life
Choose an answer
radium
polonium
radium
uranium
Previous
Skip
Next
Question # 6
Radioactivity was discovered by
Choose an answer
Rutherford
Henri Becqureal
Maxwell
James Chadwick
Previous
Skip
Next
Question # 7
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
Choose an answer
nuclear fission
nuclear fusion
man defect
radioactivity
Previous
Skip
Next
Question # 8
A curie represents a very strong source of
Choose an answer
α-particle
β-particle
γ-particle
none of these
Previous
Skip
Next
Question # 9
The energy is found from Einstein's mass energy relation is called
Choose an answer
binding energy of electron
binding energy of proton
binding energy of neutron
binding energy of nucleus
Previous
Skip
Next
Question # 10
In wilson cloud chamber, the air becomes saturated with:
Choose an answer
Alcohol vapours
Water
Helium gas
Nitrogen gas
None of these
Previous
Skip
Next
Question # 11
Marie curie and Pierre curie discovered:
Choose an answer
Uranium
Polonium
Radium
Both (A) and (C)
Plutonium
Previous
Skip
Next
Question # 12
For Protium, the mass defect is:
Choose an answer
Infinite
Zero
Very large
A few grams
None of these
Previous
Skip
Next
Question # 13
In radioactive decay, the new element which is formed due to the disintegration of original element is called
Choose an answer
element
daughter element
parent element
none of these
Previous
Skip
Next
Question # 14
Electrons are
Choose an answer
positive charged
negatively charged
massless
neutral
Previous
Skip
Next
Question # 15
Rate of decay is actually described by.
Choose an answer
Half line
Decay constant
Mean life
Total life
None of these
Previous
Skip
Next
Question # 16
When a nucleus emits an alpha particle, it atomic mass decreased by
Choose an answer
2
1
4
3
Previous
Skip
Next
Question # 17
For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
Choose an answer
A - Z
A + Z
Z
A
Previous
Skip
Next
Question # 18
Referring to the above figure, we can say that of all the elements, the most stable element is
Choose an answer
Phosphours
Iron
uranium
Lithium
Bismuth
Previous
Skip
Next
Question # 19
The missing mass which is converted to energy in the formation of nucleus, is called
Choose an answer
packing fraction
mass defect
binding energy
none of these
Previous
Skip
Next
Question # 20
Pair production take place when energy of
γ-rays photon is
Choose an answer
equal to 1.02 Mev-
greater than 1.02 Mev
less than 1.02 Mev
none of these
Previous
Skip
Next
Question # 21
Neutron was discovered by
Choose an answer
Curie
Roentgen
Chadwick
Rutherford
Previous
Skip
Next
Question # 22
The counter, which also provides the power to the G.M. tube is called:
Choose an answer
Thin mica window
thin glass window
Airy window
Wooden window
None of these
Previous
Skip
Next
Question # 23
When certain nucleus emits anα particle, its mass number:
Choose an answer
Increases by one
Decreases by one
Remain same
Decreases by four
None of these
Previous
Skip
Next
Question # 24
When radioactive nucleus emits a
β-particle, the proton-neutron ratio
Choose an answer
decrease
increase
same
none of these
Previous
Skip
Next
Question # 25
Alfa particles are
Choose an answer
hydrogen nuclei
helium nuclei
electrons
photons
Previous
Skip
Next
Question # 26
During the nuclear changes, the law/s of conservation that hold/s are that of:
Choose an answer
Charge
energy
Momentum
Mass
All of these
Previous
Skip
Next
Question # 27
γ-rays are
Choose an answer
electrostatic waves
electromagnetic waves
heavy particles
longitudinal waves
Previous
Skip
Next
Question # 28
Neutron was discovered in
Choose an answer
1915
1920
1925
1932
Previous
Skip
Next
Question # 29
The reciprocal of decay constant λ of a radioactive material is:
Choose an answer
Frequency
Half life
Year
Mean life
None of these
Previous
Skip
Next
Question # 30
In his experiment on nuclear reactions, Rutherford bombardedα particles on:
Choose an answer
Nitrogen
Hydrogen
Lead
Oxygen
Krypton
Previous
Skip
Next
Question # 31
The figure 1.007276μ shows the mass of an:
Choose an answer
Atom
Positron
Electron
Neutron
Proton
Previous
Skip
Next
Question # 32
Phenomenon of radioactivity is due to disintegration of
Choose an answer
nucleus
neutron
proton
molecule
Previous
Skip
Next
Back