Identify the functional group in the following compounds. Write its name,suffix,and prefix for each.
$(a)$ $CH_3CH_2CH_2COCl$
$(b)$ $CH_3CH_2CH_2CONH_2$
$(c)$ $CH_3CH_2CH_2CHO$

(N/A) $CH_3CH_2CH_2COCl$: The functional group is acid chloride $(-COCl)$. Its name is acid chloride,the suffix is $-oyl \ chloride$,and the prefix is $chlorocarbonyl-$.
$(b)$ $CH_3CH_2CH_2CONH_2$: The functional group is amide $(-CONH_2)$. Its name is amide,the suffix is $-amide$,and the prefix is $carbamoyl-$.
$(c)$ $CH_3CH_2CH_2CHO$: The functional group is aldehyde $(-CHO)$. Its name is aldehyde,the suffix is $-al$,and the prefix is $formyl-$.