This video lecture from Aldehydes and Ketones (F.Sc. second year Chemistry) covers the reactions of alcohols with carbonyl compounds (aldehydes and ketones). Alcohols react with aldehydes and ketones giving hemi acetals and then acetals. Acetals are di-ethers and serve as protecting groups in oxidation or reduction reactions where carbonyl group is retained by the reversible reaction. The detailed mechanism is discussed in the lecture. 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.