(a) (i) Physical state Ethanol is a colourless liquid with pleasant odour Ethanoic acid is colourless, pungent smelling liquid (ii) Taste Ethanol is bitter to taste Ethanoic acid is sour to taste (iii) NaHCO3 test Ethanol does not react with sodium bicarbonate When ethanoic acid reacts with sodium NaHCO3 with the evolution of carbon dioxide gas. (iv) Ester test Ethanol on reaction with ethanoic acid in the presence of acid forms ester Ethanoic acid on reaction with ethanol in the presence 

b) Ethanol undergoes dehydration to form ethane.
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