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Standard XII
Chemistry
Emission and Absorption Spectra
The angular m...
Question
The angular momentum of an electron in first excited state of hydrogen atom is
3
ℏ
2
ℏ
ℏ
2
ℏ
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Solution
The correct option is
B
2
ℏ
Answer (4)
m
e
v
r
=
n
ℏ
⋅
,
w
h
e
r
e
n
=
1
,
2
,
3
ℏ
=
ℏ
2
π
for first excited state,
n
=
2
∴
m
e
v
r
=
2
ℏ
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