(a) The compound is:
\[
H - C - C - C - C - Cl
\]
The IUPAC name for this compound is 1-Chloro-Butane.
(b) The compound is:
\[
H - C - C - C - C - OH
\]
The IUPAC name for this compound is Butan-1-ol.
% Topic - Chemistry: IUPAC Naming of Organic Compounds
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6.