Density of water is maximum at 4^(@)C.

1.	Density of water is maximum at 4^(@)C.
Answer» Solution :Along with covalent bond and hydrogen bond, `H_(2)O` molecule EXISTS in best form from tetrahydral from state by leaving vacant space. When heated from `O^(@)C-4^(@)C` the hydrogen bond breaks and `H_(2)O` molecule comes closer. As a result density increases to MAXIMUM at `0^(@)C`. From `4^(@)C` above, due to heat examples TAKES place by breaking the density decreases.

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