This video lecture from Aldehydes and Ketones (F.Sc. second year Chemistry) covers the acidity of compounds containing alpha hydrogen atoms because of the fact that the removal of alpha hydrogen yields two resonance structures (keto- and enol-) which stabilize the system making the substrate more acidic in nature. The acidity is employed while doing condensation reactions. 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.