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.
Explanation
Assertion (A) is true because the textbook states that scattering of light (Tyndall effect) does not occur when it passes through a transparent solution. However, Reason (R) is false because the textbook specifies that the particle size of a solute in a solution is less than 1 nm in diameter, not larger than 100 nm. Since the assertion is true but the reason is false, option (iii) is the correct choice.
Solution Steps
Step 1: Evaluate Assertion (A). The context states that scattering of light does not occur when it passes through a transparent solution, so A is true.
Step 2: Evaluate Reason (R). The context states that the particle size in a solution is less than 1 nm diameter, not larger than 100 nm, so R is false.
Step 3: Match with options. Since A is true and R is false, option (iii) is the correct choice.