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JEE Mains 28-July-2022 Shift 1 Solved Paper
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© examsnet.com
Question : 38
Total: 90
Statement I : The average momentum of a molecule in a sample of an ideal gas depends on temperature.
Statement II : The rms speed of oxygen molecules in a gas is
v
. If the temperature is doubled and the oxygen molecules dissociate into oxygen atoms, the rms speed will become
2
v
.
In the light of the above statements, choose the correct answer from the options given below:
[28-Jul-2022-Shift-1]
Both Statement I and Statement II are true
Both Statement I and Statement II are false
Statement I is true but Statement II is false
Statement I is false but Statement II is true
Validate
Solution:
[
P
avg
=
0
]
(due to random motion)
v
rms
=
√
3
RT
M
T
new
=
2
T
M
new
=
M
2
v
new
v
=
√
2
T
M
∕
2
√
T
M
v
new
=
2
v
© examsnet.com
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