question_answer

Acetals are

A)  ketones                             

B)  diethers

C)  aldehyde                           

D)  hydroxy aldehydes

Correct Answer: B

Solution :

                 Aldehyde react with alcohols in the presence of dry \[HCl\] to give gem-dialkoxy compounds. These compounds are called acetals, The addition of one molecule of alcohol to an aldehyde gives a hemiacetal. It is unstable compound and reacts further with another molecule of alcohol to form stable acetals.                 Note - Ketones do not form acetals with monohydric alcohol. They combine with diols to give cyclic to give cyclic ketals.