Question

A sample of red ink (a colloidal suspension) is prepared by mixing eosin dye, egg white, HCHO and water. The component which ensures stability of the ink sample is ______.

Options

• HCHO

• Water

• Eosin dye

• Egg white

Answer 1

The component which ensures stability of the ink sample is egg white.

Explanation:

Egg white acts as a protective colloid in the red ink preparation, ensuring stability by preventing the coagulation of colloidal particles. It stabilizes the suspension by adsorbing on particle surfaces and providing steric or electrostatic repulsion, thus preventing aggregation and settling. Other components, like HCHO (formaldehyde), may act as preservatives, but stability is mainly ensured by egg whites as the stabilizer in the colloidal system.