Chemical Process Calculation

Phase diagrams and Phase Rule-III

Question 1
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Gibbs phase rule is, when no chemical reaction occurs
F – C + P = 2
F + C – P = 2
F + C + P = 2
F – C – P = 2
Explanation:
Gibbs phase rule: F – C + P = 2.
Question 2
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What is the degree of freedom for a mixture of ice and vapour?
1
2
3
4
Explanation:
F = 2 – 2 + 1 = 1.
Question 3
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_________ variable does depend on how much material you have.
Intensive
Extensive
Both intensive and extensive
Neither intensive nor extensive
Explanation:
Extensive variable does depend on how much material you have.
Question 4
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Properties that do not depend on the quantity of material present, are called
Intensive properties
Extensive properties
Variable properties
None of the mentioned
Explanation:
Properties that do not depend on the quantity of material present are called intensive properties.
Question 5
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For a pure gas, the values of F, C, and P are
2, 2, 2
2, 2, 1
2, 1, 1
1, 1, 1
Explanation:
F – C + P = 2, for Pure gas, number of phases = 1, and component = 1, then F = 2.
Question 6
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What is the degree of freedom for pure liquid Benzene?
1
2
3
4
Explanation:
F = 2 – 1 + 1 = 2.
Question 7
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Gibbs phase rule can be applied to the systems which are in
Saturation
Equilibrium
Critical state
Supercritical state
Explanation:
Gibbs phase rule can be applied to the systems which are in equilibrium.
Question 8
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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.
True
False
Depends on a system`s properties
None of the mentioned
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.
Question 9
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Phase rule is concerned only with the __________ properties of the system.
Intensive
Extensive
Both intensive and extensive
Neither intensive nor extensive
Explanation:
Phase rule is concerned only with the Intensive properties of the system.
Question 10
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A ________ system is one in which no variation of conditions is possible without one phase disappearing.
Variant
Invariant
Constant
None of the mentioned
Explanation:
A invariant system is one in which no variation of conditions is possible without one phase disappearing.