Chemical Process Calculation Questions and Answers – Phase diagrams and Phase Rule-III

This set of tricky Chemical Process Calculation questions and answers focuses on “Phase diagrms and phase rule-III”.

1. Phase rule is concerned only with the __________ properties of the system.
a) Intensive
b) Extensive
c) Both intensive and extensive
d) Neither intensive nor extensive
View Answer

Answer: a
Explanation: Phase rule is concerned only with the Intensive properties of the system.

2. Properties that do not depend on the quantity of material present, are called
a) Intensive properties
b) Extensive properties
c) Variable properties
d) None of the mentioned
View Answer

Answer: a
Explanation: Properties that do not depend on the quantity of material present are called intensive properties.

3. _________ variable does depend on how much material you have.
a) Intensive
b) Extensive
c) Both intensive and extensive
d) Neither intensive nor extensive
View Answer

Answer: b
Explanation: Extensive variable does depend on how much material you have.
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4. Gibbs phase rule can be applied to the systems which are in
a) Saturation
b) Equilibrium
c) Critical state
d) Supercritical state
View Answer

Answer: b
Explanation: Gibbs phase rule can be applied to the systems which are in equilibrium.

5. Gibbs phase rule is, when no chemical reaction occurs
a) F – C + P = 2
b) F + C – P = 2
c) F + C + P = 2
d) F – C – P = 2
Where: F: Degree of freedom, C: Number of independent component, P: Number of phases that can exist in the system
View Answer

Answer: a
Explanation: Gibbs phase rule: F – C + P = 2.
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6. For a pure gas, the values of F, C, and P are
Where: F: Degree of freedom, C: Number of independent component, P: Number of phases that can exist in the system
a) 2, 2, 2
b) 2, 2, 1
c) 2, 1, 1
d) 1, 1, 1
View Answer

Answer: c
Explanation: F – C + P = 2, for Pure gas, number of phases = 1, and component = 1, then F = 2.

7. A ________ system is one in which no variation of conditions is possible without one phase disappearing.
a) Variant
b) Invariant
c) Constant
d) None of the mentioned
View Answer

Answer: b
Explanation: A invariant system is one in which no variation of conditions is possible without one phase disappearing.
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8. What is the degree of freedom for a mixture of ice and vapour?
a) 1
b) 2
c) 3
d) 4
View Answer

Answer: 1
Explanation: F = 2 – 2 + 1 = 1.

9. What is the degree of freedom for pure liquid Benzene?
a) 1
b) 2
c) 3
d) 4
View Answer

Answer: b
Explanation: F = 2 – 1 + 1 = 2.
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10. The number of independent properties that have to be specified to determine all the intensive properties of each phase of the system of interest is the number of degrees of freedom.
The above given statement is
a) True
b) False
c) Depends on a system`s properties
d) None of the mentioned
View Answer

Answer: a
Explanation: The number of independent properties that have to be specified to determine all the intensive properties of each phase of the system of interest is the number of degrees of freedom.

Sanfoundry Global Education & Learning Series – Chemical Process Calculation.
To practice tricky questions and answers on all areas of Chemical Process Calculation, here is complete set of 1000+ Multiple Choice Questions and Answers.

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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