Chemical Process Calculation

Phase diagrams and Phase Rule-I

Question 1
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Pass Ratio : 100%
The change of phase from liquid to vapour is called
Boiling
Melting
Condensation
None of the mentioned
Explanation:
The change of phase from liquid to vapour is called Boiling.
Question 2
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__________ is the temperature at which a liquid just start to vaporize.
Critical point
Bubble point
Triple point
Saturation point
Explanation:
Bubble point is the temperature at which a liquid just start to vaporize.
Question 3
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The one P-T-V combination at which solid, liquid and vapour are in equilibrium, is called
Critical point
Triple point
Saturation point
None of the mentioned
Explanation:
The one P-T-V combination at which solid, liquid and vapour are in equilibrium, is called Triple point.
Question 4
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If the vapour and liquid of a pure component are in equilibrium, the equilibrium pressure is called
Partial pressure
Vapour pressure
Liquid pressure
None of the mentioned
Explanation:
If the vapour and liquid of a pure component are in equilibrium, the equilibrium pressure is called Vapour pressure.
Question 5
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Pass Ratio : 100%
Find the incorrect statement for condensation
The change of phase from vapour to liquid
Occurs at constant temperature and pressure
The process appears as a point in in a P-T diagram
All of the mentioned
Explanation:
All a, b & c are correct for condensation.
Question 6
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At a given temperature there is only ________ pressure at which the vapour and liquid phases of a pure substances may exist in equilibrium.
Three
Two
One
None of the mentioned
Explanation:
At a given temperature there is only one pressure at which the vapour and liquid phases of a pure substances may exist in equilibrium.
Question 7
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______ is the temperature at which the vapour just begins to condense at a specified pressure, that is the value temperature along the vapour pressure curve.
Dew point
Bubble point
Triple point
Critical point
Explanation:
Dew point is the temperature at which the vapour just begins to condense at a specified pressure, that is the value temperature along the vapour pressure curve.
Question 8
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Incorrect statement about a phase diagram is
Phase diagram are based on equilibrium conditions
For phase equilibrium, it is assumed that the phase doesn`t remain invariant
Phase diagrams enable to view the properties of two or more phases as a function of temperature, pressure and other variable
None of the mentioned
Explanation:
For phase equilibrium, it is assumed that the phase remains invariant.
Question 9
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A non-condensable gas is found
Above the critical point
Below the critical point
On the critical point
None of the mentioned
Explanation:
A non-condensable gas is found above the critical point.
Question 10
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Pass Ratio : 100%
Representation of the different phase of a compound on a two or three dimensional graph is
Block diagram
Equilibrium diagram
Phase diagram
None of the mentioned
Explanation:
Representation of the different phase of a compound on a two or three dimensional graph is called Phase diagram.