Option (iii) is correct. Assertion A is true because transparent solutions do not show the Tyndall effect. Reason R is false because solution particles are smaller than 1 nm, not larger than 100 nm.
Assertion (A): Solutions do not exhibit the Tyndall effect. Reason (R): The particles in solutions are larger than 100 nm, so they cannot scatter light. Choose the correct option: (i) Both A and R are true and R is the correct explanation of A. (ii) Both A and R are true, but R is not the correct explanation of A. (iii) A is true, but R is false. (iv) A is false, but R is true.
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Option iii is correct. Assertion A is true because scattering of light occurs in colloids and suspensions but not in transparent solutions. Reason R is false because particles in a solution are the smallest, having a diameter less than 1 nm. Therefore, they cannot scatter light sufficiently to produce the Tyndall effect. The statement that solution particles are larger than 100 nm is incorrect.
For more NCERT Solutions of Class 9 Science Exploration Chapter 5 Exploring Mixtures and their Separation Question Answer (2026-27)
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