Some of the following are suspensions:

• (I) Fog
• (II) Air
• (III) Blood
• (IV) Paint
• (V) Aerosol sprays
• (VI) Pearl

True suspensions are:

• (A) I, II, III
• (B) III, IV, V
• (C) I, III, V
• (D) I, II, V

To determine which of the options are true suspensions, we first need to understand what a suspension is. A suspension is a mixture where solid particles are dispersed in a liquid or gas but are not dissolved. Over time, these particles can settle out. Let's analyze the given examples:

Examples of Suspensions

• Fog: A mixture of tiny water droplets in air, considered a suspension.
• Air: A homogeneous mixture of gases, not a suspension.
• Blood: Contains cells suspended in plasma, making it a suspension.
• Paint: Often contains pigments suspended in a liquid medium, qualifying it as a suspension.
• Aerosol sprays: These contain tiny particles or droplets suspended in a gas, thus are suspensions.
• Pearl: A solid object, not a suspension.

Identifying True Suspensions

From the analysis, the true suspensions are:

• Fog (I)
• Blood (III)
• Paint (IV)
• Aerosol sprays (V)

Correct Answer

The correct option that includes true suspensions is (B) III, IV, V, which includes Blood, Paint, and Aerosol sprays.