Give the structure and IUPAC names of straight chain alkanes with molecular formula
(i) `C_(4)H_(10),(ii)C_(5)H_(12),(iii)C_(6)H_(14)`.

Explanation

(i) `underset("Butane")(C_(4)H_(10)):" "H-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-H" or "CH_(3)-CH_(2)-CH_(2)-CH_(3)`
(ii) `underset("Pentene")(C_(5)H_(12)):" "H-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-H" or "CH_(3)-CH_(2)-CH_(2)-CH_(2)-CH_(3)`
(iii) `underset("hexane")(C_(6)H_(14)):" "H-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-H" or "CH_(3)-CH_(2)-CH_(2)-CH_(2)-CH_(2)-CH_(3)`