Answer
The IUPAC name of the compound is $2-chlorobenzene-1,4-dicarboxylic \hspace1mm acid$. The common name of the compound is $2-chloroterephthalic \hspace1mm acid$
Work Step by Step
The acid has 2 $COOH$ groups at positions 1 and 4 of a benzene ring, and a $chloro$ substituent at position 2 of the benzene ring. So, the IUPAC name of the compound is $2-chlorobenzene-1,4-dicarboxylic \hspace1mm acid$. The common name of the compound is $2-chloroterephthalic \hspace1mm acid$
