Chemisty !!

(a) Why do the densities of most liquids increase as they are cooled and solidified? How does water differ in this regard?

(b) Rank the following compounds in order of decreasing surface tension at a given temperature, and explain your ranking.
CH3CH3, CH3OH, H2C=O
(c) Rank the following compounds in order of increasing viscosity at a given temperature; explain your ranking.
HOCH2CH2OH, CH3CH2CH2OH, HOCH2CH(OH)CH2OH

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asked by Xiang !

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