The provided image shows four chemical compounds: $(CH_3CO)_2O$ $(I)$,$CH_3COOH$ $(II)$,$PhOH$ $(III)$,and $CH_3COCHO$ $(IV)$. Identify the correct statement regarding these compounds.

Name the following compounds according to the $IUPAC$ system of nomenclature:
$(i)$ $CH_3-CH(CH_3)-CH_2-CH_2-CHO$
$(ii)$ $CH_3-CH_2-CO-CH(C_2H_5)-CH_2-CH_2-Cl$
$(iii)$ $CH_3-CH=CH-CHO$
$(iv)$ $CH_3-CO-CH_2-CO-CH_3$
$(v)$ $CH_3-CH(CH_3)-CH_2-C(CH_3)_2-CO-CH_3$
$(vi)$ $(CH_3)_3C-CH_2-COOH$
$(vii)$ $OHC-C_6H_4-CHO-p$

Which of the following is the first member of the ester homologous series?

Which of the following is $NOT$ a dicarboxylic acid?

For the dicarboxylic acid represented by the formula $HOOC-(CH_2)_n-COOH$,if $n = 4$,what is the common name of this acid?

Which of the following is a tricarboxylic acid?