The formation of cyanohydrin from acetone is which type of reaction?

Nucelophilic addition reaction

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Electrophilic substitution reaction

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Electrophilic addition reaction

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Nucelophilic substitution reaction

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Solution

The correct option is A Nucelophilic addition reaction
Cyanohydrin formation:

This reaction is nucleophilic addition reaction.
Step (i): The nucleophilic carbon in the cyanide adds to the electrophilic carbon in the polar carbonyl group, electrons from the $C = O$ move to the electronegative $O$ creating an intermediate alkoxide.
Step (ii): An acid/ base reaction protonation of the alkoxide oxygen creates the cyanohydrin product.

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Question 07
Considering the formation, breaking and strength of hydrogen bond, predict which of the following mixtures will show a positive deviation from Raoult's law?
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