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OneTime: Test: Gibbs Phase Rule - Chemistry MCQ


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10 Questions MCQ Test Physical Chemistry - OneTime: Test: Gibbs Phase Rule

OneTime: Test: Gibbs Phase Rule for Chemistry 2024 is part of Physical Chemistry preparation. The OneTime: Test: Gibbs Phase Rule questions and answers have been prepared according to the Chemistry exam syllabus.The OneTime: Test: Gibbs Phase Rule MCQs are made for Chemistry 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for OneTime: Test: Gibbs Phase Rule below.
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OneTime: Test: Gibbs Phase Rule - Question 1

What is the point at which all the three phases of a system exist?

Detailed Solution for OneTime: Test: Gibbs Phase Rule - Question 1

Since at the triple point, the degree of freedom is zero (that is invariant reaction takes place at that point), therefore according to phase rule, F = C - P + 2. Substituting the known values, we get P = 3 (all states).

OneTime: Test: Gibbs Phase Rule - Question 2

Liquid phase exists for all compositions above _________ region.

Detailed Solution for OneTime: Test: Gibbs Phase Rule - Question 2

In a phase region above the eutectic point, both the solid and liquid phases exist together where the region is bi variant and this region is called isometric region. Here the region has 2 degrees of freedom.

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OneTime: Test: Gibbs Phase Rule - Question 3

Select a non-homogeneous system from the following.

Detailed Solution for OneTime: Test: Gibbs Phase Rule - Question 3

A homogeneous mixture is one which is miscible completely with one another. In any saturated solution, when the amount of solute reaches more than a critical point, then the solution becomes heterogeneous.

OneTime: Test: Gibbs Phase Rule - Question 4

Which of the following is the formula for condense phase rule?

Detailed Solution for OneTime: Test: Gibbs Phase Rule - Question 4

In a condensed phase rule system, the phases are represented in three dimension which is not suitable for graphic purposes and hence the pressure is considered to be zero (this is helpful in drawing 2D images). Hence the formula reduces to F = C - P + 2.

OneTime: Test: Gibbs Phase Rule - Question 5

Under what condition, will we get a stable phase diagram?

Detailed Solution for OneTime: Test: Gibbs Phase Rule - Question 5

According to equilibrium mixture ration, an appropriate ratio of 1:10 parts of solid and liquid along with an aqueous solution will give a stable phase product.

OneTime: Test: Gibbs Phase Rule - Question 6

What does Gibb’s phase rule state?

Detailed Solution for OneTime: Test: Gibbs Phase Rule - Question 6

The above phase rule is a formula that gives the condition for finding the number of phases in a system. This phase rule can be applied to both condensed as well as normal systems.

OneTime: Test: Gibbs Phase Rule - Question 7

For water system, the number of phases at the triple point is _____________

Detailed Solution for OneTime: Test: Gibbs Phase Rule - Question 7

Since at the triple point, the degree of freedom is zero, while applying the formula F = C - P + 2, we get the number of phases as three because C = 1, F = 0 (since water system forms only single component).

OneTime: Test: Gibbs Phase Rule - Question 8

Select the wrong statements from the following statements with respect to a phase diagram.

Detailed Solution for OneTime: Test: Gibbs Phase Rule - Question 8

A phase diagram gives information only on the concentration of species, their solubility rate, degree of freedom and other physical properties. It does not explain about transformation rates and relative concentration (relative concentration=total concentration/equilibrium concentration).

OneTime: Test: Gibbs Phase Rule - Question 9

Select the odd statement with respect to a phase reaction.

Detailed Solution for OneTime: Test: Gibbs Phase Rule - Question 9

A terminal solution, an intermediate solution, an equilibrium solution and concentric solutions, are the ones which take part in a phase reaction. On the other hand, a saturated solution is involved in the Lever system.

OneTime: Test: Gibbs Phase Rule - Question 10

Calculate the eutectic concentration given the following data.
Pressure = 1atm
Temperature: 1oC

Detailed Solution for OneTime: Test: Gibbs Phase Rule - Question 10

According to Weiss law (which suits only for phase components), concentration at equilibrium is C = T/P. therefore in this case, C = 1/1 = 1. This law is also called as Gibbs relativity law.

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