The major type of reactions that alkanes undergo is

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Alkanes undergo free radical substitution reactions, where a hydrogen atom is replaced by a halogen in the presence of ultraviolet light or a radical initiator. This is the major type of reaction for alkanes as the C-C and C-H bonds in alkanes are relatively unreactive towards electrophiles and nucleophiles. Alkanes do not undergo electrophilic addition reactions as there are no pi bonds to attack, and similarly, they do not undergo nucleophilic substitution reactions as the C-H bonds are not easily broken.

The Major Type of Reactions That Alkanes Undergo Is