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Q.

Which of the following has the least density?

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a

Water

b

Cotton

c

Air

d

Chalk

answer is B.

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Detailed Solution

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The density of an object is defined as the mass per unit volume.
So the increasing order of the given objects in terms of their density will-

Air < Cotton < Water < Chalk < Iron

Thus, the air has the least density among the given options.

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