1. What are polymer colloids?
A.
Colloids formed by individual polymer molecules dispersed in a solvent
B.
Colloids formed only by metal atoms
C.
Colloids containing only small ions
D.
Colloids formed by gases dissolved in gases
Correct Answer:
Colloids formed by individual polymer molecules dispersed in a solvent
Explanation:
Polymer colloids are formed when large polymer molecules, such as proteins or starch, are dispersed in a suitable solvent.
2. Which of the following is a natural polymer that can form a polymer colloid?
A.
Starch
B.
Sodium chloride
C.
Copper sulfate
D.
Hydrogen chloride
Correct Answer:
Starch
Explanation:
Starch is a natural polymer and can form a polymer colloidal solution when dispersed in water.
3. Which of the following is an example of a polymer colloid?
A.
Protein solution
B.
Sugar solution
C.
Sodium chloride solution
D.
Hydrochloric acid solution
Correct Answer:
Protein solution
Explanation:
Proteins are naturally occurring polymers, and their solutions can behave as polymer colloids.
4. In a polymer colloid, the dispersed particles are usually:
A.
Individual large polymer molecules
B.
Individual atoms
C.
Only small ions
D.
Simple gases
Correct Answer:
Individual large polymer molecules
Explanation:
A polymer colloid contains separate large polymer molecules dispersed throughout the continuous medium.
5. Which type of polymer can form a polymer colloid in a suitable solvent?
A.
Soluble polymer
B.
Insoluble rock
C.
Simple metal atom
D.
Noble gas
Correct Answer:
Soluble polymer
Explanation:
A polymer must be soluble or sufficiently dispersible in a suitable solvent to form a polymer colloid.
6. Which of the following is a synthetic polymer capable of forming a polymer colloid?
A.
Nylon
B.
Sodium chloride
C.
Calcium carbonate
D.
Ammonia
Correct Answer:
Nylon
Explanation:
Nylon is a synthetic polymer, and suitable polymeric materials can form polymer colloidal dispersions.
7. Polymer colloids are classified as macromolecular colloids because their particles are:
A.
Single macromolecules
B.
Clusters of small ions only
C.
Individual atoms
D.
Molecules of simple gases
Correct Answer:
Single macromolecules
Explanation:
Macromolecular colloids contain individual macromolecules, such as proteins or synthetic polymers, as dispersed particles.
8. Which property is characteristic of polymer colloids?
A.
Their dispersed particles have very high molecular mass
B.
Their dispersed particles are always metal ions
C.
They contain no solvent
D.
They are made only from gases
Correct Answer:
Their dispersed particles have very high molecular mass
Explanation:
Polymer colloids contain macromolecules with very high molecular masses, which gives them their colloidal nature.
9. Which of the following substances can form a polymer colloid in water?
A.
Gelatin
B.
Potassium nitrate
C.
Methane
D.
Oxygen
Correct Answer:
Gelatin
Explanation:
Gelatin is a protein polymer that can disperse in water to form a polymer colloidal system.
10. A solution of a suitable polymer in a solvent is considered a polymer colloid when the polymer molecules:
A.
Remain dispersed as large molecular particles
B.
Break completely into atoms
C.
Change into simple inorganic ions
D.
Evaporate from the solvent
Correct Answer:
Remain dispersed as large molecular particles
Explanation:
The polymer molecules retain their large molecular identity and remain dispersed in the solvent, producing a polymer colloid.
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