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Q1. The mass per unit volume of a substance is called density. (density=mass/volume). Arrange the following in the order of increasing density – air, exhaust from the chimneys, honey, water, chalk, cotton and iron.

Answer :

The following substances are arranged in the increasing density:

Air   <   Exhaust from chimney   <   Cotton   <   Water   <   Honey   <   Chalk   <   Iron.