Question : Which of the following colloids is an example of foam?
Option 1: Sponge
Option 2: Butter
Option 3: Cheese
Option 4: Mist
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Correct Answer: Sponge
Solution : The correct option is Sponge.
One kind of colloid that is an example of foam is a sponge. Foam refers to the dispersion of gas bubbles in a liquid or solid medium, while colloids are materials that have uniformly distributed particles within them. Their colloidal nature allows them to hold and release large amounts of liquid. A sponge is an example of a foam in a colloidal system because it forms a structure resembling foam inside its pores as it absorbs water.
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