The correct decreasing order of priority for functional groups of organic chemistry in the IUPAC nomenclature system is:
As we have discussed in the videos, the correct order of priority for functional group of organic chemistry in IUPAC nomenclature is:
⇒ −COOH > −SO3H > −COO−M+ > −COOR > −COX > −CONH2 > −C≡N > −CHO > C =O > −OH > −SH > −NH2 > =NH > −OR > −SR
Therefore,
From the given options, the correct order is
−COOH > −SO3H > −CONH2 > −CHO
Carboxylic acid > Sulphuric acid > Amide > Aldehyde