Question

In each of the following pairs which is present in higher concentration in a basic solution:

Answer 1

(A) keto form predominates.
(B) keto form predominates.
(C) keto form predominates.
(D) keto form predominates.
(E) enol form predominates.
The compounds A and C have higher enol content due to aromatic stablization in enol form.
Ketonic form predominates in simple monocarbonyl compounds like acetone, acetophenone and aetic acid.
This is due to greater strength of C=O present in keto form than C=C bond present in enol form.
Enolic form predominates in 1,3 dicarbonyl compounds such as acetyl acetone or in compounds in which enol form results in aromatic stablization.