ESTERS GCSE AQA

What is the smell of esters?

• sweet

• pungent

• odourless

• choking

Esters are usually derived from?

• alcohols

• ethers

• carboxylic acids

• aldehydes

What is the general formula for esters?

• -OH

• R-O-X

• RCOOR'

• -COOH

Answer explanation

A condensation reaction usually results in the formation of what byproduct?

TRUE or FALSE: the name of this ester is ethyl butanoate

• TRUE

• FALSE

Which of the following will have a stronger smell than ethyl propanoate?

• butyl propanoate

• ethyl pentanoate

• propyl butanoate

• methyl ethanoate

Esterification uses which catalyst?

• concentrated HSO4

• concentrated H2SO4

• diluted H2SO4

• concentrated H4SO2

Which two compounds can react together to form an ester?

• 
• 
• 
• 

How does the boiling point of an ester compare to the boiling point of the carboxylic acid from which it was derived?

• no consistent relationship

• boiling point of ester is higher

• the boiling points are about the same

• boiling point of the ester is lower

Why are esters volatile?

• high melting points

• low melting points

• low boiling points

• high boiling points