This set of Chemical Process Calculation Multiple Choice Questions & Answers (MCQs) focuses on “Real gases”.
1. The set of physical conditions at which the density and other properties of a liquid and vapour become identical, is called
a) Corresponding state
b) Critical state
c) Equation of state
d) None of the mentioned
View Answer
Explanation: The set of physical conditions at which the density and other properties of a liquid and vapour become identical is known as Critical state.
2. Critical point occurs at
a) Highest temperature and pressure at which gas and liquid can coexist
b) Lowest temperature and pressure at which gas and liquid can coexist
c) Highest temperature and lowest pressure at which gas and liquid can coexist
d) Lowest temperature and highest pressure at which gas and liquid can coexist
View Answer
Explanation: Critical point occurs at highest temperature and pressure.
3. Material in a state above its critical point is
a) Critical fluid
b) Supercritical fluid
c) Plasma fluid
d) None of the mentioned
View Answer
Explanation: Material in a state above its critical point is called Supercritical fluid.
4. “Any compound should have the same reduced volume at the same reduced pressure and reduced temperature.” Is known as
a) Law of corresponding states
b) Law of critical state
c) Law of reduced state
d) None of the mentioned
View Answer
Explanation: Any compound should have the same reduced volume at the same reduced pressure and reduced temperature law of corresponding states.
5. Compressibility factor z is
a) z = PV/RT
b) z = Pv/RT
c) z = PM/RT
d) z = PV/nT
Where: P – Absolute Pressure of the gas
V – Total volume occupied by the gas
n – Number of moles of the gas
T – Absolute temperature
v – Specific molar volume
View Answer
Explanation: z = Pv/RT.
6. For an ideal gas, the compressibility factor is
a) 0.5
b) 1.0
c) 1.5
d) 2.0
View Answer
Explanation: z = Pv/RT = 1, for an ideal gas.
7. A parameter that indicates the degree of nonsphericity of a molecule is called
a) Compressibility factor
b) Acentric factor
c) Holburn factor
d) None of the mentioned
View Answer
Explanation: A parameter that indicates the degree of nonsphericity of a molecule is called Acentric factor.
8. The summation of each of the partial pressure of the component in a system equals to the total pressure. Is
a) Dalton`s law
b) Boyle`s law
c) Charles`s Law
d) None of the mentioned
View Answer
Explanation: The summation of each of the partial pressure of the component in a system equals to the total pressure is Dalton`s law.
9. For the Van der Waals real gas equation
Statement I: The unit of constant a is atm.L2/mole2
Statement II: The unit of constant b is L
a) Both statements are false
b) Only one can be true at a time
c) Both statement are true
d) None of the mentioned
View Answer
Explanation: In the first statement, Specific molar volume is used and in second one, total volume. So for the given equation both statement can not be true at a time.
10. Corrected and normalized conditions of temperature, pressure and volume, normalized by their respective critical conditions is called
a) Reduced variables
b) Corresponding variables
c) Standard condition variables
d) None of the mentioned
View Answer
Explanation: Corrected and normalized conditions of temperature, pressure and volume, normalized by their respective critical conditions is called Reduced variables.
Sanfoundry Global Education & Learning Series – Chemical Process Calculation.
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