Question

How do carboxylic acids and esters differ in chemical structure?
Check all that may apply.
Esters have a hydroxyl group.
Esters have a carboxyl group.
Esters have a carboxyl group and hydrogen linkage off the alpha carbon.
Esters have a carboxyl group and ether linkage off the alpha carbon.

Answer 1

What's your problem with this?
Esters are RCOOCR'
Acids are RCOOH

Answer 2

Esters have a carboxyl group and ether linkage off the alpha carbon