The combination of a carbonyl group and a hydroxyl group on the same carbon atom is called a8 6. a) carbamate group b) carbonate c) carboxlate d) carboxyl 7. the positively polarized carbon atom of a carbonyl group acts as: a) an electrophile and a lewis base. b) a nucleophile and a lewis base c) an electrophile and a lewis acid d) a nucleophile and a lewis acid. 8. the iupac name for the compound shown below. ? ? a) 2-hydroxybenzoic acid b) 3-hydroxybenzoic acid c) 1-hydroxybenzoic acid d) 5-hydroxybenzoic acid