Write the structural formula of a compound of molecular formula `C_(4)H_(8)Cl_(2)` in which
(a) all the carbon atoms are involved in `-CH_(2)` groups
(b) none of the carbon atoms is involved in `-CH_(2)` group.

Explanation

(a) `{:(CH_(2)-CH_(2)-CH_(2)-CH_(2)),("| |"),(Cl" "Cl):}`
(b) `{:(CH_(3)-CH-CH-CH_(3)),(" | |"),(" "Cl " " Cl):}`