Question

How will you prepare a suspension of chalk in water?

• A. By placing a piece of chalk in cold water
• B. By placing a piece of chalk in hot water
• C. By placing powdered chalk in water and then vigorously shaking it
• D. By placing powder chalk in dilute hydrochloric acid

Answer 1

The correct option is C

By placing powdered chalk in water and then vigorously shaking it

Explanation for the correct option:

(C) By placing powdered chalk in water and then vigorously shaking it.

• Suspension: It is a heterogeneous mixture of particles that settle down under gravity after some time.
• When chalk powder is dissolved in water, a suspension is formed.
• The mixture is stirred for a while to ensure that the chalk powder is evenly dispersed in the water.
• Chalk powder does not dissolve in water. It simply forms a suspension in water and settles down over time due to gravity.

Hence option (C) is correct.