Question

plz help and kindly explain the ans​

Answer 1

Explanation:

Keto-enol tautomerism means that the compound will undergo tautomerism and will show the structure of both ketone group and enol group but will have the same chemical formula..

A compound showing Keto- enol tautomerism must have alpha hydrogen in its structure..

it's clearly seen in 4th option..so 4th is correct one...which is (A) option

hope it is correct and might help you..

Answer 2

Answer:

In the above diagram the first structure is ketone and the second structure is alcohol. Hence, keto-enol tautomerism is observed in C6H5−CO−CH3 . So, the correct answer is “Option B”

Hope it helps u !!