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Answer:
1. Yes, dust is a colloid (aerosol).
2. Yes, whipped cream is a colloid (foam).
3. Sol means "suspension of solid."
4. Colloidal mixture scatters light (Tyndall scattering).
Explanation:
1. Dust can be considered a colloid, specifically a type called aerosol. Aerosols are colloidal systems in which solid or liquid particles are dispersed in a gas medium.
2. Yes, whipped cream is a colloid. It is a type of foam, which is a colloidal system where gas bubbles are dispersed in a liquid medium.
3. "Sol" typically refers to a colloidal dispersion, where solid particles are suspended within a liquid medium. It stands for "suspension of solid."
4. When a colloidal mixture is hit by light, it undergoes the phenomenon known as Tyndall scattering. The dispersed particles within the colloidal system scatter the light, making the otherwise invisible particles visible and producing a visible beam of light passing through the mixture.