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Class 11 NEET Chemistry Structure Of Atom Questions
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© examsnet.com
Question : 63
Total: 82
What will be the longest wavelength line in Balmer series of spectrum?
(1996)
546
n
m
656
n
m
566
n
m
556
n
m
Validate
Solution:
The longest wavelength means the lowest energy. We know that relation for wavelength
1
λ
=
R
H
(
1
n
1
2
−
1
n
2
2
)
here,
n
1
=
2
,
n
2
=
3
R
H
( Rydberg constant
=
109677
c
m
−
1
1
λ
=
109677
(
1
(
2
)
2
−
1
(
3
)
2
)
=
15233
or,
λ
=
1
15233
=
6.56
×
10
−
5
c
m
=
6.56
×
10
−
7
m
=
656
n
m
© examsnet.com
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