$a)$$CH_3CH_2CH_2CH_2CH_3:n-pentan$
$(CH_3)_2CHCH_2CH_3:2-metyl butan$
$(CH_3)_4C:2,2-dimetyl propan$
$b)$
$CH_2=CH-CH=CH_2:but-1,3 dien$
$CH_3-CH=CH-CH=CH_3:pent-1,3 dien$
$CH_2=C(CH_3)-CH=CH_2:iso pren$
$c)$
$CH_3CH_2CH_2-C\equiv CH:pentin-1$
$CH_3CH_2-C\equiv C-CH_3:pentin-2$
$(CH_3)_2CH-C\equiv CH:3-metyl butin-1$
$d)$
$C_6H_5-C_2H_5:etyl benzen$
$o,m,p-CH_3-C_6H_4-CH_3$
$C_6H_5-CH_2-CH_2OH;C_6H_5-CHOH-CH_3;HO-C_6H_4-C_2H_5.....................................................$