(a) Write the structural formulae and give IUPAC names for all the isomeric alcohols of the molecular formula `C_(5)H_(12)O`. Indicate any chirality.
`(b)` Write the structures and name all the cyclic `C_(4)H_(7) OH` isomers.

Explanation

`(a)` `C_(5)H_(12)O` is a monohydric alcohol, i.e, `C_(5)H_(11)OH`. It can have the following eight isomers `:`
`(1)` `underset("Pentan-3-ol"(1^(@)))(overset(5)(C)H_(3) overset(4)(C)H_(2)overset(3)(C)H_(2)overset(2)(C)H_(2)overset(1)(C)H_(2)OH)" "(2)` `underset("Pentan-2-ol"(2^(@)))(overset(5)(C)H_(3)overset(4)(C)H_(2)overset(3)(C)H_(2).^(**)overset(OH)overset(|2)(C)Hoverset(1)(C)H_(3))`
(3) `underset("Pentane-3-ol"(2^(@)))(overset(5)(C)H_(3)overset(4)(C)H_(2)overset(OH)overset(|3)(C)H overset(2)(C) H_(2)overset(1)H_(3))" "(4)` `underset("3-Methyl butan-1-ol"(1^(@)))(overset(4)(C)H_(3)overset(CH_(3))overset(|3)(C)Hoverset(2)(C)H_(2)overset(1)(C)H_(2)OH)`
(5) `underset("2-Methylbutan-2-l"(3^(@)))(H_(3)overset(1)(C)-underset(OH)underset(|)overset(CH_(3))overset(|2)(C)-overset(3)(C)H_(2)overset(4)(C)H_(2))" "(6)` ` underset("2,2-Dimethylpropan-1-ol"(1^(@)))(overset(3)(C)H_(3)=underset(CH_(3))underset(|)overset(CH_(3))overset(2|)(C)-overset(1)(C)H_(2)OH)`
(7) `underset("3-Methylbutan 2-2ol"(2^(@)))(overset(4)(C)H_(3)overset(CH_(3))overset(|3)(C)H-.^(**)overset(OH)overset(|2)(C)H-overset(1)(C)H_(3))" "(8)` `underset(2-Methylbutan-1-ol"(1^(@)))(overset(4)(C)H_(3)overset(3)(C)H_(2).^(**)overset(CH_(3))overset(|2)(CH)overset(1)(C)H_(2)OH)`
`.^(**)` Isomers (2),(7) and (8) containing chiral centres can exhibit enantiomerism.