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Question 3
A mixture of sulphur and carbon disulphide is

(a) heterogeneous and shows Tyndall effect
(b) homogeneous and shows Tyndall effect
(c) heterogeneous and does not show Tyndall effect
(d) homogeneous and does not show Tyndall effect
 


Solution

The answer is (a).
A mixture of sulphur and carbon disulphide is a heterogeneous mixture and shows Tyndall effect.Mixture formed is a colloid. In a colloidal solution, the particles are big enough to scatter light. 
The scattering of light by colloidal particles is known as Tyndall effect. Colloids are actually heterogeneous in nature though they appear to be homogeneous. 
 

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