Question

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

Answer 1

The correct option is D

homogeneous and does not show Tyndall effect

Homogeneous mixtures:

1. A mixture is said to be a homogeneous mixture if it has the same composition throughout the sample.
2. A homogeneous mixture has no visible boundaries of separation between various constituents.
3. For example, salt solution (sodium chloride is dissolved in water), sugar solution (sugar dissolved in water).

Tyndall effect:

1. The Tyndall effect, also known as the Tyndall phenomenon, is the scattering of a light beam by a medium containing tiny suspended particles.

Explanation of correct option:

(d) Homogeneous and does not show Tyndall effect:

1. Sulphur dissolves completely in carbon disulphide solvent.
2. A mixture of sulphur and carbon disulphide is a homogeneous mixture.
3. This solution doesn't exhibit the Tyndall effect because the particles in these solutions are too tiny to scatter light in several directions.

Explanation of incorrect options:

Since sulphur in carbon disulphide forms a homogeneous mixture thus options (a), (b) and (c) are incorrect.

Hence, option (d) is the correct option.