Write the IUPAC names of the following compounds
(i) `CH_(3)-underset(CH_(3))underset(|)(CH)-CH_(2)-CH_(3)`
(ii) `CH_(3)-CH=CH-CH_(2)-CH_(3)`
(iii) `CH_(3)-underset(O)underset(||)(C)-CH_(2)-CH_(3)`
(iv) `CH_(3)-CH_(2)-underset(Cl)underset(|)(C)H-CH_(3)`

Explanation

(i) `underset("2-Methylbutane")(overset(1)(C)H_(3)-underset(CH_(3))underset(|)(overset(2)(C)H)-overset(3)(C)H_(2)-overset(4)(CH_(3))`
(ii). `underset("Pent-2-ene")(overset(1)(C)H_(3)-overset(2)(C)H=overset(3)(CH)-overset(4)(CH_(2))-overset(5)(CH)_(3))`
(iii) `underset("Butanone")(overset(1)(C)H_(3)-underset(O)underset(||)(overset(2)(C))-overset(3)(C)H_(2)-overset(4)(C)H_(3))`
(iv). `underset("2-Chlorobutane")(Coverset(4)(H)_(3)-overset(3)(C)H_(2)-underset(Cl)underset(|)(overset(2)(C)H-overset(1)(C)H_(3))`.