1.

When a plastic bottle completelyfilled with water is kept in a freezer, it breaks. Why does this happen?

Answer»

Solution :(1) The temperature of air in the FREEZER ( deep freeze) COMPARTMENT of a refrigerator is less thatn `0^(@)C `. ( 2) When a plastic bottle, completely filled with WATER, is KEPT in this compartment , the temperature of water fallsbelow `4^(@)C` and the water expands. Even when water freezesand ice is formed, there is an increases in the volume. It exerts a LARGE pressure on the sides of the bottle and hence the bottle is likely to break.


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