Halogenation of alkanes is:

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(B) The reaction of an alkane with a halogen in the presence of ultraviolet $(UV)$ light or heat is a free radical substitution reaction. In this proc

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An oxidative process

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(B) The reaction of an alkane with a halogen in the presence of ultraviolet $(UV)$ light or heat is a free radical substitution reaction. In this process,a hydrogen atom of the alkane is replaced by a halogen atom. Since the oxidation state of the carbon atom increases (or the number of bonds to more electronegative atoms increases),this is classified as an oxidative process.

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