State Of Matter & Phase Rule

20 Questions | Total Attempts: 78

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State Of Matter & Phase Rule

STATE OF MATTER & PHASE RULE


Questions and Answers
  • 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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