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WorksheetsDr.V.SANGU -PHASE RULE-1
Total questions: 10
Worksheet time: 14mins
1.Gibbs phase rule for general system:
(a) P+F=C-1
(b) P+F=C+1
(C) P+F=C-2
(d) F =C-P+2
2.A phase diagram shows the relationship between
pressure, volume, and the three phases of matter
temperature, pressure, and the three phases of matter
temperature, volume, and the three phases of matter
Non of the above
3. How many phases and components are present in the following systems?
a) 2,2
b) 2,1
c) 1, 1
c) 1,2
4. How many components are present in the following systems?
KCl + Water → KCl hydrate
a) 3
b) 2
c) 1
d) 4
5. How many phases are present in each of the following systems :
a drop of water placed in a stoppered bottle
a piece of molten ice placed in a beaker covered with a watch glass
mixture of N2, H2 and O2.
a) 2, 2 , 1
b) 1, 1 ,3
c) 1, 1, 1
d) 2, 2, 3
6. What is meant by triple point ?
Three phases are in equilibrium
Three components are in equilibrium
Degree of freedom is three
Non of the above
7.What is meant by invariant point ?
Degree of freedom is zero
Number of component is zero
Number of phases is zero
Non of the above
9.Which statement is incorrect in the following
Triple point of water exist at 0.00750 C and at 4.5mm pressure
At triple point of water all the three phases of water co-exist
Solid cie ↔ Liquid water ↔ Vapour
Triple point of water is an invariant point Degree of freedom F =0
At the triple point of water number of phases are equal to three
9.Which statement is incorrect about is the meta stable of water
Water is carefully cooled below zero degree ceisius give super cooled water
Meta stable curve is the extension of Vaporization curve of water
This curve is present above sublimation curve
Meta stable curve Liquid water is equilibrium with solid ice
↔ 10. Determine the number of phases, components and number of degrees of freedom for the following systems :
(i) N2(g) + O2(g) ↔ 2NO(g)
(ii) Na2SO4 .10H2O ↔ Na2SO4 + 10H2O(g)
a) p= 1, F =3
b)P= 1, F =1
c) p= 3, F =2
d) p= 2, F =3
