Question
Chemistry Question on Surface Chemistry
The phenomenon observed when a beam of light is passed through a colloidal solution, is
A
cataphoresis
B
delectrophoresis
C
coagulation
D
Tyndall effect
Answer
Tyndall effect
Explanation
Solution
On passing a beam of light through a colloidal solution, the colloidal particles absorb light energy and then emit it in all the possible directions. This phenomenon is called scattering of light or Tyndal effect.
Note: Tyndall effect is not observed in true solutions.