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