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Online Tests
Ics Part 2 Physics Chapter 9 Test Online MCQs With Answers
Question # 1
The radius of 10th orbit in hydrogen atom is.
Choose an answer
0.053 nm
0.53 nm
5.3 nm
53 nm
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Question # 2
Black Body radiation spectrum is an example of:
Choose an answer
Atomic spectra
Line spectra
Continuous spectra
None of above
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Question # 3
In Helium Neon laser, discharge tube is filled with Neon gas.
Choose an answer
10%
15%
85%
90%
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Question # 4
If 13.6 eV energy is required to ionize the hydrogen atom, then the required energy to remove an electron from n=2 is:
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10.2 eV
0 eV
3.4 eV
6.8 eV
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Question # 5
The following gas was identified in the sun using spectroscopy
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Hydrogen
Helium
Carbon
Nitrogen
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Question # 6
The value of Rydberg constant is
Choose an answer
1.0974 x 10
7
m
-1
1.0974 x 10
-7
m
-1
1.0974 x 10
6
m
-1
1.0974 x 10
-6
m
-1
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Question # 7
Which is not characteristic of Laser.
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Monochromatic
Coherent
Intense
Multi direction
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Question # 8
For Holography we use
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X ray
Laser
gama rays
Beta rays
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Question # 9
Frequency of x-rays depends upon.
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Number of electrons striking target
Accelerating potencial
Nature of the target
Both B and C
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Question # 10
In Helium Neon laser, the discharge tube is filled with
Choose an answer
80% He, 20% Neon
85% He, 15% Neon
83% He, 17% Neon
90% He, 10% Neon
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Question # 11
The series in visible region is:
Choose an answer
Balmer series
Pfund series
Paschen series
None of above
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Question # 12
A° is the unit of:
Choose an answer
Energy
Length
Nuclear energy
Work
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Question # 13
In an electronic transition atom cannot emit.
Choose an answer
Infrared radiations
Visible radiations
Ultraviolet radiations
Gama radiations
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Question # 14
An atom can reside in excited state for
Choose an answer
10
-8
second
One second
10
-10
second
More than one second
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