Question

The IUPAC name of following compound
is :-
COOHY COOH
COOH
(1) Propan-1, 2, 3-Tri Carboxylic acid
(2) 3-Carboxymethylpentane-1, 5-dioicacid
(3) 1, 2, 3-Pentanetrioic acid
(4) 1, 2, 3-Tripropane carboxylic acid​

Answer 1

ethanedioic acid

Explanation:

there are two carbon atoms in the longest chain, hence the parent chain belong to ethane. Both the carbon atoms are involved in the carboxylic group formation,hence it is a "dioic acid" . thus the iupac name of oxalic acid is "ethanedioic acid".