Consider the following statements : I. A colloid and a suspension are heterogeneous mixtures. II. Colloids can be separated from the mixture by the process of centrifugation. III. Particles of colloids and suspensions can be seen by naked eye. IV. The aqueous solution of copper sulphate does not show Tyndall effect; however, the mixture of milk and water shows Tyndall effect. Which of the statements given above is/are correct?
- A. I only
- B. II and III only
- C. I, II and III
- D. I, II and IV ✓
Correct Answer: D. I, II and IV
Explanation
Statement III is incorrect because particles of a colloid are too small to be seen with the naked eye. Statements I, II, and IV correctly describe the properties of colloids, suspensions, and true solutions.
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