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An ideal gas is expanded adiabatically. How many times the gas to be expanded to reduce the rms velocity of molecules 2 times.
Select one:
  • a)
    4 times
  • b)
    2 times
  • c)
    8 times
  • d)
    16 times
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
An ideal gasis expanded adiabatically. How many times the gas to be ex...
To reduce the rms velocity two times, temperature should be reduced by 4 times. 

∴ 
V1 = V, V2 = ?
From adiabatic law,

⇒ 
⇒ 

⇒ 
⇒ 
The correct answer is: 16 times
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An ideal gasis expanded adiabatically. How many times the gas to be expanded to reduce the rms velocity of molecules 2 times.Select one:a)4 timesb)2 timesc)8 timesd)16 timesCorrect answer is option 'D'. Can you explain this answer?
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