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

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

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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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