The principle applied in liquefaction of gases is_____________________?

Related Mcqs:

1. Claude’s liquefaction process employs the cooling of gases by__________________?

   A. Expansion in an engine
   B. Following a constant pressure cycle
   C. Throttling
   D. None of these

2. Linde gas liquefaction process employs cooling ____________________?

   A. By throttling
   B. By expansion in an engine
   C. At constant pressure
   D. None of these

3. Claude gas liquefaction process employs cooling___________________?

   A. At constant pressure
   B. By throttling
   C. By expansion in an engine
   D. None of these

4. Grams of butane (C4H10) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be__________________?

   A. 580
   B. 640
   C. 1160
   D. Data insufficient; can’t be computed

5. Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is_____________________?

   A. Positive
   B. Negative
   C. Zero
   D. Infinity

6. Compound having large heat of formation is_____________________?

   A. More stable
   B. Less stable
   C. Not at all stable (like nascent O2)
   D. Either more or less stable; depends on the compound

7. Number of phases in a colloidal system is_____________________?

   A. 1
   B. 2
   C. 3
   D. 4

8. Maxwell’s relation corresponding to the identity, dH = dS = Vdp + Σμi dni is_____________________?

   A. (∂T/∂V)S, ni = -(∂P/∂S)V, ni
   B. (∂S/∂P)T, ni = (∂V/∂T)P, ni
   C. (∂S/∂V)T, ni = (∂P/∂T)V, ni
   D. (∂T/∂P)S, ni = (∂V/∂S)P, ni

9. Joule-Thomson co-efficient for a perfect gas is_____________________?

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

10. When pressure is applied on the system, ice ↔ water, then_________________?

    A. Equilibrium cannot be established
    B. More ice will be formed
    C. More water will be formed
    D. Evaporation of water will take place