The density of ice is ______than that of liquid water, and thus ice floats on water.

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less

water

water, less

None of these

answer is A.

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Detailed Solution

Concept- The density of ice is less than the density of water. When water is cooled, and ice is created, there are many empty spaces between the ice particles. This is due to the fact that when water is frozen, the molecules are unable to create as many hydrogen bonds as they can while it is liquid.
As a result, ice molecules are not as close together as liquid water molecules. The ice has a cage-like structure to it. When compared to the spacing between water particles, the spaces generated are bigger.
As a result, ice has a lower density than liquid water and hence floats atop water.
Hence, the correct answer is option 1.

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