8.15 Justify giving reactions that among halogens, fluorine is the best oxidant and among hydrohalic compounds, hydroiodic acid is the best reductant.
The oxidizing power of halogens increases in the order of
Hence, fluorine is the best oxidant among halogens.
Hl and HBr can reduce , but HCl and HF cannot
Therefore, Hl and HBr are stronger reductants than HCl and HF
Again, can reduce to , but cannot.
Hence, hydroioic acid is the best reductant among hydrohalic compounds.
Thus, reducing the power of hydrohalic acid increases in the order of HF<HCl<HBr<Hl.