State Of Matter & Phase Rule
STATE OF MATTER & PHASE RULE
- 1.Which of following describe the gaseous state of matter?
- A.
A) A gas has both definite shape and volume.
- B.
B) A gas has definite shape but not definite volume.
- C.
C) A gas has definite volume but not definite shape.
- D.
D) A gas has neither definite shape nor volume.
- 2.One of the assumption s of the ideal gas law is that:
- A.
A) Molecules have no attraction to one another.
- B.
B) Gas particles move slowly.
- C.
C) Molecules move in curved paths.
- D.
D) None of the above.
- 3.The phenomenon in which a substance exists in more than one crystalline form is known as:
- A.
A) Polymorphism.
- B.
B) Crystallinity.
- C.
C) Anisotropy.
- D.
D) Polycrystallinity.
- 4.A vapor is:
- A.
A) A very dense gas.
- B.
B) A gas with weak vander waal forces.
- C.
C) A gas that is normally a liquid.
- D.
D) All of the above.
- 5.Polymorphism refers to compound having:
- A.
A) Different stereochemistry
- B.
B) Different crystal structure
- C.
C) Different composition
- D.
D) All of the above.
- 6.The max temp at which the two phase region exists in a mixture of two partially miscible liquid is known as:
- A.
A) Upper con-solute temp.
- B.
B) Lower con solute temp
- C.
C) Critical temp.
- D.
D) Kraft point.
- 7.Amorphous form of a drug dissolves_______ than the crystalline form.
- A.
A) Slower.
- B.
B) Faster.
- C.
C) Equal to.
- D.
D) Does not dissolve.
- 8.Which of the following are properties or examples of amorphous solids?
- A.
A) No crystal structure
- B.
B) No definite melting point
- C.
C) Glassy
- D.
D) All of the above.
- 9.Mesomorphic substances:
- A.
A) Are in between solid and liquid
- B.
B) Are nematic
- C.
C) Are smectic
- D.
D) All of the above.
- 10.What kind of liquid crystal consists of parallel molecules in layers?
- A.
A) Cholesteric.
- B.
B) Nematic.
- C.
C) Smectic
- D.
D) All of the above.
- 11.The change of state from a solid directly to a gas is known as:
- A.
A) Fusion
- B.
B) Boiling
- C.
C) Sublimation
- D.
D) Evaporation
- 12.Which of the following characteristics are NOT shared by liquid and gases?
- A.
A) Ability to diffuse.
- B.
B) Indefinite volume.
- C.
C) Indefinite shape.
- D.
D) Fluidity.
- 13.The process of converting ice to water by application of heat proceed with:
- A.
A) An increase in energy and a decrease in entropy.
- B.
B) An increase in energy and an increase in entropy.
- C.
C) A decrease in energy and a decrease in entropy.
- D.
D) A decrease in energy and an increase in entropy.
- 14.The phase rule was first discovered by
- A.
A) Nernst
- B.
B) Gibbs
- C.
C) Arrhenius
- D.
D) Le Chatelier
- 15.A mixture of three gases O2, N2, CO2 is
- A.
A) 1-phase system
- B.
B) 2- phase system
- C.
C) 3-phase system
- D.
D) 4-phase system
- 16.A saturated solution of sodium chloride is a
- A.
A) One phase system
- B.
B) Two phase system
- C.
C) Three phase system
- D.
D) none of the above
- 17.At a triple point
- A.
A) Both the temp & pressure are fixed
- B.
B) Only temp is fixed
- C.
C) Only the pressure is fixed
- D.
D) Sometimes pressure & sometimes temp is fixed.
- 18.A system with zero degree of freedom is known as
- A.
A) Monovariant
- B.
B) Bivariant
- C.
C) Invariant
- D.
D) None of the above.
- 19.The number of components in a solution of common salt is
- A.
0
- B.
1
- C.
2
- D.
4
- 20.The temp at which a polymorphic substance changes from one form to another is called
- A.
A) Equilibrium temp
- B.
B) Triple point
- C.
C) Boyle’s temp
- D.
D) Transition temp
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