Question

Cork is a colloid of:

• A. Solid in solid
• B. Liquid in solid
• C. Solid in liquid
• D. Gas in solid

Hint:

Cork is an example of a solid matrix with gas trapped inside, forming a colloidal solution.

Answer 1

The Correct Option is D

Cork is a colloid of: 

• Option 1: Solid in solid - This refers to a solid dispersion within another solid, like alloys. This is not the correct answer for cork.
• Option 2: Liquid in solid - This refers to a liquid dispersed in a solid, like gels or some food products. This is not the correct description for cork.
• Option 3: Solid in liquid - This describes a suspension, which is not what cork is made of.
• Option 4: Gas in solid - This is the correct answer. Cork is a solid that contains gas trapped within its cellular structure, making it a colloidal system with gas dispersed in a solid form. This is why cork is light and buoyant.

Explanation:

Cork is a colloidal solution in which gas is trapped in a solid matrix. This makes it a gas in solid colloid. The gas trapped in the cork's cellular structure gives it its lightweight and buoyant properties.