Gases are cooled in Joule-Thomson expansion, when it is _____________ inversion temperature?

Related Mcqs:

1. Joule-Thomson co-efficient which is defined as, η = (∂T/∂P)H = 1/Cp (∂H/∂T)P, changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is ___________________?

   A. 0
   B. ∞
   C. +ve
   D. -ve

2. Joule-Thomson Co-efficient at any point on the inversion curve is___________________?

   A. ∞
   B. +ve
   C. 0
   D. -ve

3. The Joule-Thomson co-efficient is defined as (∂T/∂P)H. Its value at the inversion point is__________________?

   A. ∞
   B. 1
   C. 0
   D. -ve

4. During Joule-Thomson expansion of gases_________________?

   A. Enthalpy remains constant
   B. Entropy remains constant
   C. Temperature remains constant
   D. None of these

5. Joule-Thomson effect i.e., a throttling process is a constant _____________ process?

   A. Entropy
   B. Temperature
   C. Internal energy
   D. Enthalpy

6. Throttling (Joule-Thomson effect) process is a constant _____________ process?

   A. Enthalpy
   B. Entropy
   C. Pressure
   D. None of these

7. All gases above its inversion temperature, in a throttling process will show__________________?

   A. A heating effect
   B. No change in temperature
   C. A cooling effect
   D. Either A. or (C)

8. In Joule-Thomson porous plug experiment, the__________________?

   A. Enthalpy does not remain constant
   B. Entire apparatus is exposed to surroundings
   C. Temperature remains constant
   D. None of these

9. The value of Joule-Thomson co-efficient, in case where cooling occurs after the throttling process is________________?

   A. 0
   B. ∞
   C. +ve
   D. -ve

10. What is the value of Joule-Thomson co-efficient for an ideal gas ?

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