________________ decreases during adiabatic throttling of a perfect gas?

Related Mcqs:

1. The adiabatic throttling process of a perfect gas is one of constant enthalpy_________________?

   A. In which there is a temperature drop
   B. Which is exemplified by a non-steady flow expansion
   C. Which can be performed in a pipe with a constriction
   D. In which there is an increase in temperature

2. On a P-V diagram of an ideal gas, suppose a reversible adiabatic line intersects a reversible isothermal line at point A. Then at a point A, the slope of the reversible adiabatic line (∂P/∂V)s and the slope of the reversible isothermal line (∂P/∂V)T are related as (where, y = Cp/Cv) ?

   A. (∂P/∂V)S = (∂P/∂V)T
   B. (∂P/∂V)S = [(∂P/∂V)T]Y
   C. (∂P/∂V)S = y(∂P/∂V)T
   D. (∂P/∂V)S = 1/y(∂P/∂V)T

3. After throttling, gas temperature___________________?

   A. Decreases
   B. Increases
   C. Remain same
   D. May increase or decrease; depends on the nature of the gas

4. All gases except ____________ shows a cooling effect during throttling process at atmospheric temperature and pressure?

   A. Oxygen
   B. Nitrogen
   C. Air
   D. Hydrogen

5. All gases during throttling process at atmospheric temperature and pressure show a cooling effect except__________________?

   A. CO2
   B. H2
   C. O2
   D. N2

6. The compressibility factor of a gas is given by (where, V1 = actual volume of the gas V2 = gas volume predicted by ideal gas law)____________________?

   A. V1/V2
   B. V2/V1
   C. V1 – V2
   D. V1.V2

7. The density of a gas ‘X’ is twice that of another gas ‘Y’. If the molecular weight of gas ‘Y’ is ‘M’; then the molecular weight of the gas ‘X’ will be________________?

   A. 2M
   B. M/2
   C. M
   D. M/4

8. The work done in an adiabatic change in a particular gas depends upon changes in the ______________ only?

   A. Temperature
   B. Specific heat
   C. Volume
   D. Pressure

9. Specific heat of a gas for a reversible adiabatic process is________________?

   A. Negative
   B. Zero
   C. Infinity
   D. None of these

10. The difference between isothermal compressibility and adiabatic compressibility for an ideal gas is____________________?

    A. 0
    B. +ve
    C. -ve
    D. ∞