This video lecture from Aliphatic Hydrocarbons (F.Sc. second year Chemistry) covers the nomenclature of hydrocarbons with multiple bonds. Alkenes with double bonds and alkynes with triple bonds and the hydrocarbons with both double and triple bonds have been discussed. Moreover the priority order of double bond, triple bond and the substituent groups has been explained with suitable examples. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.