Which of the following statements `"is"//"are"` correct about the aldol reaction?

Options

A. Aldehydes and ketones having at least one `beta`-hydrogen
B. The reaction is carried out in the presence of concentrated alkali
C. The product formedis `beta`-hydroxy aldehydes (aldol) or `beta`-hydroxy ketone (ketol)
D. All of the above

Answer

C

Explanation

Aldehydes and ketones having at least one a-hydrogen undergo a reaction in the presence of dilute alkali as catalyst to form `beta`-hydroxy aldehydes (aldol) or `beta`-hydroxy ketones (ketol) respectively. This is known as aldol reaction.
`underset("aldehyde")underset("containing")underset(alpha-"hydrogen")(2R-CH_2-overset(O)overset(||)C-H) overset("Dil. NaOH")to underset("(Aldol)")underset(beta-"hydroxy aldehyde")(R-CH_2 -underset(H)underset(|)overset(OH)overset(|)C-underset(R)underset(|)CH- overset(O)overset(||)C-H)`