A. Zero
B. Unity
C. Infinity
D. Negative
Related Mcqs:
- For an ideal solution, the value of activity co-efficient is______________________?
A. 0
B. 1
C. 1 - Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ______________ with the increase of reduced temperature?
A. Decreases
B. Increases
C. Remains constant
D. Decreases logarithmically - For an ideal gas, the activity co-efficient is_________________?
A. Directly proportional to pressure
B. Inversely proportional to pressure
C. Unity at all pressures
D. None of these - The activity co-efficient of a solution, which accounts for the departure of liquid phase from ideal solution behaviour________________?
A. Measures the elevation in boiling point
B. Is not dependent on the temperature
C. Is a function of the liquid phase composition
D. Measures the depression in freezing point - 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 - What is the value of Joule-Thomson co-efficient for an ideal gas ?
A. +ve
B. -ve
C. 0
D. ∞ - Near their critical temperatures, all gases occupy volumes _____________ that of the ideal gas?
A. Less than
B. Same as
C. More than
D. Half - Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are_______________?
A. Always greater than one
B. Same at the same reduced temperature
C. Same at the same reduced pressure
D. Both B. & C - 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 - ______________ Equation predicts the activity co-efficient from experimental data ?
A. Lewis-Randall
B. Margules
C. Van Laar
D. Both B. & C.
