Practice important
Cellulose Colloids
MCQ questions and answers.
Page 1
of
1
|
10
MCQ Questions
1. Cellulose forms which type of colloid when dispersed in a suitable solvent?
A.
Macromolecular colloid
B.
Multimolecular colloid
C.
Associated colloid
D.
Suspension
Correct Answer:
Macromolecular colloid
Explanation:
Cellulose is a naturally occurring polymer with very large molecules, so its colloidal dispersions are classified as macromolecular colloids.
2. Cellulose is best classified as which type of colloidal substance?
A.
Lyophilic colloid
B.
Lyophobic colloid
C.
Emulsion
D.
Aerosol
Correct Answer:
Lyophilic colloid
Explanation:
Cellulose has an affinity for suitable dispersion media because of its polymeric structure and polar groups, so it is considered a lyophilic colloidal substance.
3. Which of the following is a natural polymer that can form a macromolecular colloid?
A.
Cellulose
B.
Sodium chloride
C.
Copper sulfate
D.
Calcium carbonate
Correct Answer:
Cellulose
Explanation:
Cellulose is a natural polymer made of repeating glucose units and can form macromolecular colloidal dispersions in suitable media.
4. The colloidal nature of cellulose is mainly due to its:
A.
Very large molecular size
B.
Very small ionic size
C.
Metallic character
D.
Simple molecular structure
Correct Answer:
Very large molecular size
Explanation:
Cellulose molecules are extremely large polymeric molecules, and their size lies in the colloidal range when dispersed in a suitable medium.
5. Cellulose colloids are generally stabilized by interaction between cellulose molecules and the:
A.
Dispersion medium
B.
Metal electrode
C.
Precipitating salt only
D.
Gas phase only
Correct Answer:
Dispersion medium
Explanation:
In cellulose colloids, attraction and solvation by the dispersion medium help stabilize the dispersed macromolecules.
6. Which property is commonly associated with cellulose as a macromolecular colloid?
A.
High stability in a suitable medium
B.
Immediate formation of a precipitate in every solvent
C.
Complete absence of interaction with the medium
D.
Formation only as a gas
Correct Answer:
High stability in a suitable medium
Explanation:
Cellulose is a lyophilic macromolecular substance, so its colloidal dispersion is generally stable when the appropriate medium is used.
7. Cellulose colloids belong to which broad class of colloids based on the size of the dispersed particles?
A.
Macromolecular colloids
B.
Multimolecular colloids
C.
True solutions
D.
Coarse suspensions
Correct Answer:
Macromolecular colloids
Explanation:
A cellulose molecule itself is sufficiently large to behave as a colloidal particle, which is the defining feature of a macromolecular colloid.
8. Cellulose is composed of repeating units of which simple sugar?
A.
Glucose
B.
Fructose
C.
Sucrose
D.
Lactose
Correct Answer:
Glucose
Explanation:
Cellulose is a natural polysaccharide made of repeating glucose units, giving it the large molecular structure needed to form macromolecular colloids.
9. A dispersion of cellulose in a suitable solvent is an example of a:
A.
Macromolecular sol
B.
Metallic alloy
C.
True ionic solution
D.
Gas mixture
Correct Answer:
Macromolecular sol
Explanation:
When cellulose macromolecules are dispersed in a suitable solvent, the resulting colloidal system is called a macromolecular sol.
10. Which feature of cellulose helps it interact with a suitable solvent in forming a lyophilic colloid?
A.
Presence of polar hydroxyl groups
B.
Presence of metallic bonds
C.
Absence of oxygen atoms
D.
Presence of noble-gas atoms
Correct Answer:
Presence of polar hydroxyl groups
Explanation:
Cellulose contains many hydroxyl groups, which can interact with suitable solvent molecules and contribute to its lyophilic colloidal behavior.
Short Questions and Answers
Practice short questions and answers related to
Cellulose Colloids
.
Short questions are currently unavailable for this page.