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Byju's Answer
Standard XII
Chemistry
Real Gases
The ratio of ...
Question
The ratio of
(
E
2
ā
E
1
)
to
(
E
4
ā
E
3
)
for
H
- atom is approximately.
A
10.2
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B
15.4
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C
5.6
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D
12.4
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Solution
The correct option is
B
15.4
As we know,
E
∝
−
Z
2
n
2
E
H
=
−
13.6
n
2
=
E
1
n
2
E
2
−
E
1
=
−
E
1
4
+
E
1
=
3
E
1
4
----- 1
E
4
−
E
3
=
−
E
1
16
+
E
1
9
=
7
E
1
16
×
9
----- 2
From the 1st and 2nd equation we have,
∴
E
2
−
E
1
E
4
−
E
3
=
3
E
1
4
×
16
×
9
7
E
1
=
15.4
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0
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