Answer:
(I) Aldehydes or ketoses with
at least one 
hydrogen undergo a reaction in the
presence of dilute alkali as catah to form 
hydroxy
aldehyde also called aldol or hydroxyl ketones
also called ketol.
e.g.
(ii) Ester of carboxylic acid on
treatment with phenol o alcohol in the presence of mineral acid as a catalyst
gives another ester. This reaction is called trans-etherification reaction.
e.g.
You need to login to perform this action.
You will be redirected in
3 sec
