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Identify the form from the following.

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in Engineering Chemistry II by (789k points)
Identify the form from the following.

(a) Cheese

(b) Paint

(c) Pumice stone

(d) Cork

The question was posed to me during an online interview.

Question is taken from Colloids topic in portion Surface Chemistry of Engineering Chemistry II

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The correct choice is (c) Pumice stone

For explanation I would say: According to the hardness scale, it is found that pumice stone is stronger than lime stone but is weaker than quartz. Hence it is a colloid of solid and a gas (moisture). So, it is a form.

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