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MCQ on CSIR NET Physics Online Coaching for Students
The viscosity of gas is due to the transport of
1. Mass
3. Momentum
4. None of above
Option 3 – Momentum
In diffusion the transport of which of the following occurs.
1. heat
2. energy
3. mass
4. momentum
Option 3 – mass
What is the temperature at which the root mean square velocity of the molecules will be zero?
1. 300°K
2. -273°K
3. -273°C
4. None of the above
Option 3 – -273°C
The vessel containing the gas has a small hole in it causing the gas to leak. When the temperature is increased from 400K to 900K the rate of leakage of the gas will be
1. decreases by a factor of 0.44
2. increases by a factor of 2.25
3. increases by a factor of 1.5
4. remains the same
Option 3 – increases by a factor of 1.5
For a diatomic gas having 3 translational and 2 rotational degrees of freedom, the energy is
1. KT
2. 5/2 KT
3. 3/2KT
4. KT/2
Option 2 – 5/2 KT
The coefficient of performance of a refrigerator working between 10°C and 20°C is
1. 11.77
2. 9.77
3. 8.77
4. 10.77
Option 3 – 8.77
The specific heat at a constant volume of solids is known to obey Debye’s T³ law
1. at high pressure
2. at high temperature
3. at low temperature
4. at very low temperature
Option 4 – at very low temperature
A gas behaves as an ideal gas
1. at high pressure and high temperature
2. very low pressure and high temperature
3. high pressure and low temperature
4. low pressure and low temperature
Option 2 – very low pressure and high temperature
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