Question

Cyanohydrin of the CH3CHO on hydrolysis give optically active product

Answer 1

One of the two pairs of electrons that make up a carbon-oxygen double bond is even more easily pulled towards the oxygen. That makes the carbon-oxygen ... together with a negative charge. It's essential to realise that in the cyanide ion the active lone pair and the charge are on the carbon atom and not the nitrogen.

Answer 2

Oxygen is far more electronegative than carbon and so has a strong tendency to pull electrons in a carbon-oxygen bond towards itself. One of the two pairs of electrons that make up a carbon-oxygen double bond is even more easily pulled towards the oxygen. That makes the carbon-oxygen double bond very highly polar.
electrons.