Question

The tautomeric form which is less stable is called?

• A. enol form
• B. keto form
• C. labile form
• D. all of these

Answer 1

The correct option is A enol form

In most keto-enol tautomerism, the equilibrium lies by far toward the keto form, indicating that the keto form is usually much more stable than the enol form. Thus, the tautomeric form which is less stable is called enol form.

Hence, option A is correct.