Question

Tautomerism is due to:

• A. delocalization of sigma electrons
• B. delocalization of pi electrons
• C. migration active $H-$atom
• D. none is correct

Answer 1

Answer: (C)

migration active $H-$atom

Tautomerism, the existence of two or more chemical compounds that are capable of facile interconversion, in many cases merely exchanging a hydrogen atom between two other atoms, to either of which it forms a covalent bond.

Hence, option C is correct.