
Atomic Spectra RT
Authored by Azfar haque
Physics
University
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Radius of first orbit of Hydrogen atom is equal to
5.3 A0
0.53 A0
53 A0
5.53 A0
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The ratio of the kinetic energy and the total energy of the electron in the hydrogen atom, according to Bohr’s theory, is
1: - 1
1:1
1:2
1: - 2
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Atomic hydrogen is excited to the 8th energy level. How many spectral lines can be observed in spectrum?
8
16
28
64
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The ratio of minimum to maximum wavelength in Balmer series is:
5 : 9
5 : 36
1 : 4
3 : 4
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The transitions of inner shell electrons in heavy atoms give rise to the emission of:
γ –rays
x – rays
β – rays
None of these
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Meta stable states have life time of the order of:
10–8 sec
10–6 sec
10–3 sec
10–10 sec
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Highly intense, monochromatic and coherent beam of light obtained by stimulating atoms of a suitable material is called
X- rays
Laser
Ultraviolet rays
γ-rays
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