Question

Which of the following shows the Tyndall effect?
(I) Common salt
(ii) milk
(iii) Copper sulphate solution
(iv) Starch solution

• A. (i) and (ii)
• B. (ii) and (iv)
• C. (iii) and (iv)
• D. (ii) and (iii)

Answer 1

The correct option is B (ii) and (iv)

Tyndall effect is shown by colloidal solutions. It is not shown by true solutions or suspensions.
Milk and starch solution are colloidal solutions. They show tyndall effect .
On the other hand, common salt and copper sulphate solution are true solutions. They do not show tyndall effect.