Answer the following case-based question:
 
Ethanoic acid is commonly called acetic acid and belongs to a group of acids called carboxylic acids. A 5-8% solution of acetic acid in water is called vinegar and is used widely as a preservative in pickles.
 
a. Which condition is essential for the dehydration of ethanol to ethene?
 
b. Ethanoic acid is prepared industrially by the oxidation of ethanol using:
 
c. The fruity smell observed during esterification of ethanol is due to the formation of:
 
 
d. What happens when ethanoic acid is reacted with carbonates and bicarbonates?