Question

funtional gruup means and types

Answer 1

functional groups can replace hydrogen from a hydrocarbon change without affecting the valency.
types- halogens
alcohols.
aldehydes
ketone
carboxylic acids

:) hope that helps

Answer 2

functional groups means an atom or group of atom which determines the characteristics property of an organic compounds.

Functional group ...example are alcohol
aldehyde
carboxylic acid
ketone
ether
amins
alkyl halides