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Byju's Answer
Standard XII
Physics
Temperature
At STP the or...
Question
At
S
T
P
the order of mean square velocity of molecules of
H
2
,
N
2
,
O
2
and
H
B
r
is-
A
H
2
>
N
2
>
O
2
>
H
B
r
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B
H
B
r
>
O
2
>
N
2
>
H
2
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C
H
B
r
>
H
2
>
O
2
>
N
2
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D
N
2
>
O
2
>
H
2
>
H
B
r
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Solution
The correct option is
A
H
2
>
N
2
>
O
2
>
H
B
r
V
r
m
s
∝
1
√
M
Order of molecular weight
=
H
2
<
N
2
<
O
2
<
H
B
r
∴
order of
V
r
m
s
=
H
2
>
N
2
>
O
2
>
H
B
r
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