Alkyl iodides cannot be prepared directly by the halogenation of alkanes because _.

Explanation

Option A: Iodine is slightly soluble in water. It has the lowest standard reduction potential of the halogens, and is therefore the least powerful oxidizing agent. Air and other reagents can oxidize acidified solution of iodide ions.Iodine does not react with the alkanes to any extent - at least, under normal lab conditions. The reactions between alkanes and chlorine or bromine: There is no reaction in the dark.Option B: Iodination is a reversible reaction because HI is a very strong reducing agent. Since the reaction is reversible in nature, we use oxidizing agents like HNO3 or HIO3 to destroy HI.Option C:HI is very strong reducing agent. When reaction is first carried out in forward direction HI formed tries to reduce CH3l and the iodine in HI tries to oxidize itself from oxidation state-1 from 0 and thus the reaction go in backward direction.