The substance formed on addition of water to an aldehyde or ketone is called a hydrate or a/an: A) vicinal diol
B) geminal diol
C) acetal
D) ketal

B) geminal diol

Explanation:

Hello,

In this case, considering the attached picture, you can see that the substance resulting from the hydrolysis of an aldehyde or a ketone is a geminal diol since the two hydroxyl groups are in the same carbon. Such hydrolysis could be carried out in either acidic or basic conditions depending upon the equilibrium constant.

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