Hyperconjugation involves delocalization of. (i) Electrons of carbon-hydrogen σ bond of an alkyl group directly to an atom of unsaturated system. (ii) Electrons of carbon-hydrogen σ bond of an alkyl group directly attached to the positively charged carbon atom. (iii) π-electron of carbon-carbon bond. (iv) Lone pair of electrons.

Hyperconjugation involves delocalization of. (i) Electrons of carbon-

1.	Hyperconjugation involves delocalization of. (i) Electrons of carbon-hydrogen σ bond of an alkyl group directly to an atom of unsaturated system. (ii) Electrons of carbon-hydrogen σ bond of an alkyl group directly attached to the positively charged carbon atom. (iii) π-electron of carbon-carbon bond. (iv) Lone pair of electrons.
Answer» (i), (ii) Hyperconjugation, also known as sigma-pi conjugation, is the delocalization of sigma electrons. Presence of αH with respect to double bond, triple bond or carbon containing positive charge (in carbonium ion) or unpaired electron (in free radical) is a condition required for hyperconjugation.