Alkanes are most likely to undergo what type of reactions?

Alkanes are most likely to undergo substitution reactions, specifically, free radical substitution reactions. This type of reaction involves the replacement of a hydrogen atom by a halogen atom.

Here are the steps of a free radical substitution reaction:

1. Initiation: This is the first step where the halogen molecule breaks down into two halogen atoms due to the absorption of ultraviolet light. These atoms are very reactive and are known as free radicals.

2. Propagation: In this step, the free radical reacts with the alkane, replacing a hydrogen atom and forming a new free radical.

3. Termination: This is the final step where two free radicals react with each other to form a molecule, thus ending the reaction.

It's important to note that alkanes are relatively unreactive due to the non-polar nature of the C-H and C-C bonds. However, they can react with halogens in the presence of UV light or high temperature.