Question:
The macromolecular colloids of the following are
I. Starch solution
II. Sulphur sol
III. Synthetic detergent
IV. Synthetic rubber
The macromolecular colloids of the following are
I. Starch solution II. Sulphur sol III. Synthetic detergent IV. Synthetic rubber
I. Starch solution II. Sulphur sol III. Synthetic detergent IV. Synthetic rubber
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Macromolecular colloids are formed by giant polymer molecules such as starch, proteins, nylon and synthetic rubber, whereas detergents form associated colloids and sulphur sol forms multimolecular colloids.
Updated On: Jun 22, 2026
- I, II
- II, III
- III, IV
- I, IV
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The Correct Option is D
Solution and Explanation
Step 1: Understand macromolecular colloids.
Macromolecular colloids are colloidal systems in which the dispersed particles themselves are large molecules having very high molecular mass.
These macromolecules form colloidal-sized particles directly when dissolved in a suitable medium.
Step 2: Analyze starch solution.
Starch is a natural polymer with a very large molecular mass.
When dissolved in water, starch forms a colloidal solution due to its giant molecular size.
Hence, starch solution is a macromolecular colloid.
Step 3: Analyze sulphur sol.
Sulphur sol is a multimolecular colloid because many small sulphur molecules aggregate together to form colloidal particles.
Therefore, it is not a macromolecular colloid.
Step 4: Analyze synthetic detergent.
Synthetic detergents form associated colloids (micelles) above critical micelle concentration (CMC).
Thus, they are associated colloids and not macromolecular colloids.
Step 5: Analyze synthetic rubber.
Synthetic rubber is a polymer having very high molecular mass.
It behaves as a macromolecular colloid in suitable solvents.
Hence, synthetic rubber is a macromolecular colloid.
Step 6: Final conclusion.
Therefore, the macromolecular colloids are \[ \boxed{\text{I and IV}} \]
Macromolecular colloids are colloidal systems in which the dispersed particles themselves are large molecules having very high molecular mass.
These macromolecules form colloidal-sized particles directly when dissolved in a suitable medium.
Step 2: Analyze starch solution.
Starch is a natural polymer with a very large molecular mass.
When dissolved in water, starch forms a colloidal solution due to its giant molecular size.
Hence, starch solution is a macromolecular colloid.
Step 3: Analyze sulphur sol.
Sulphur sol is a multimolecular colloid because many small sulphur molecules aggregate together to form colloidal particles.
Therefore, it is not a macromolecular colloid.
Step 4: Analyze synthetic detergent.
Synthetic detergents form associated colloids (micelles) above critical micelle concentration (CMC).
Thus, they are associated colloids and not macromolecular colloids.
Step 5: Analyze synthetic rubber.
Synthetic rubber is a polymer having very high molecular mass.
It behaves as a macromolecular colloid in suitable solvents.
Hence, synthetic rubber is a macromolecular colloid.
Step 6: Final conclusion.
Therefore, the macromolecular colloids are \[ \boxed{\text{I and IV}} \]
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