Practice important
Natural Macromolecular Colloids
MCQ questions and answers.
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10
MCQ Questions
1. Which of the following is a natural macromolecular colloid?
A.
Starch
B.
Sodium chloride
C.
Copper sulfate
D.
Potassium nitrate
Correct Answer:
Starch
Explanation:
Starch is a naturally occurring polymer that forms a colloidal solution in water, so it is a natural macromolecular colloid.
2. Which natural macromolecular colloid is a protein?
A.
Gelatin
B.
Starch
C.
Cellulose
D.
Natural rubber
Correct Answer:
Gelatin
Explanation:
Gelatin is a protein obtained from collagen and forms a natural macromolecular colloid in water.
3. Which of the following is a natural polysaccharide that can form a macromolecular colloid?
A.
Cellulose
B.
Glucose
C.
Ethanol
D.
Acetic acid
Correct Answer:
Cellulose
Explanation:
Cellulose is a natural polysaccharide with very large molecules, making it a natural macromolecular substance.
4. Natural macromolecular colloids are generally formed by substances obtained from:
A.
Living organisms
B.
Only metals
C.
Only noble gases
D.
Synthetic plastics only
Correct Answer:
Living organisms
Explanation:
Natural macromolecular colloids include substances such as starch, proteins, cellulose, and gums, which are obtained from plants or animals.
5. Which natural product forms a macromolecular colloidal solution in water?
A.
Gum
B.
Sodium chloride
C.
Potassium iodide
D.
Calcium carbonate
Correct Answer:
Gum
Explanation:
Natural gums contain very large molecules and disperse in water to form macromolecular colloidal solutions.
6. Proteins are classified as natural macromolecular colloids because they:
A.
Have very large molecules
B.
Are simple ions
C.
Have very small atomic masses only
D.
Are completely insoluble in every solvent
Correct Answer:
Have very large molecules
Explanation:
Proteins consist of very large molecules, so their dispersions in suitable solvents show the behavior of macromolecular colloids.
7. Which pair contains only natural macromolecular colloids?
A.
Starch and gelatin
B.
Sodium chloride and glucose
C.
Copper sulfate and urea
D.
Potassium nitrate and calcium chloride
Correct Answer:
Starch and gelatin
Explanation:
Starch and gelatin are naturally occurring high-molecular-mass substances that form macromolecular colloids.
8. Natural rubber is an example of a:
A.
Natural macromolecular substance
B.
Simple electrolyte
C.
Small inorganic molecule
D.
Metallic colloid
Correct Answer:
Natural macromolecular substance
Explanation:
Natural rubber is a naturally occurring polymer with very large molecules, so it belongs to natural macromolecular substances.
9. Which natural macromolecular colloid is commonly obtained from animal collagen?
A.
Gelatin
B.
Starch
C.
Cellulose
D.
Natural rubber
Correct Answer:
Gelatin
Explanation:
Gelatin is produced from collagen, an animal protein, and forms a natural macromolecular colloid.
10. Starch, cellulose, and natural rubber are grouped together because they are:
A.
Naturally occurring polymers
B.
Simple inorganic salts
C.
Low-molecular-mass electrolytes
D.
Metallic sols
Correct Answer:
Naturally occurring polymers
Explanation:
Starch, cellulose, and natural rubber are natural polymers with large molecules, which is why they are associated with natural macromolecular colloids.
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