Liquids generally have lower density as compared to solids But you must have observed that ice floats on water Find out why CBSE Class9 Chemistry 2013

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Liquids generally have lower density as compared to solids. But you must have observed that ice floats on water. Find out why? CBSE- Class9- Chemistry 2013

CBSE- Class9- Chemistry 2013


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The mass per unit volume of a substance is called density (density = mass/volume). As the volume of a substance increases, its density decreases.

Though ice is a solid, but it has a cage like structure hence there are large number of empty spaces between its particles. These spaces are larger as compared to the spaces present between the particles of water. Thus for a given mass of water, volume of ice is greater than that of water. Hence, the density of ice is less than that of water. A substance with lower density than water can float on water. Therefore, ice floats on water. 

Concept insight: For answering this question, link density with floating and sinking. A substance with lower density than water will float on water. A substance with higher density than water will sink in water.


13priya

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