Which among the following is the correct arrangement of halogens in th

Which among the following is the correct arrangement of halogens in the increasing order of their oxidizing nature ?

F, Cl, Br, I
Cl, Br, F, I
Br, I, Cl, F
I, Br, Cl, F
This question was previously asked in
UPSC NDA-1 – 2023
The oxidizing nature of an element refers to its ability to gain electrons and cause the oxidation of another substance. For halogens (Group 17 elements: F, Cl, Br, I, At), the oxidizing power generally decreases down the group. This is because electronegativity and electron affinity decrease, while the atomic radius increases, making it less favorable to gain an electron as you move from Fluorine to Iodine. Therefore, the increasing order of their oxidizing nature is Iodine (I) < Bromine (Br) < Chlorine (Cl) < Fluorine (F). Fluorine is the strongest oxidizing agent among the halogens.
– Oxidizing nature is the ability to gain electrons.
– For halogens, oxidizing power decreases down the group (from F to I).
– This is due to decreasing electronegativity and electron affinity.
– The order of oxidizing strength is F₂ > Cl₂ > Br₂ > I₂.
– The increasing order of oxidizing nature is I < Br < Cl < F.
Fluorine is the most electronegative element and has a very high oxidizing potential. It can oxidize all other halide ions. Chlorine can oxidize bromide and iodide ions. Bromine can oxidize iodide ions, but not fluoride or chloride ions. Iodine is the weakest oxidizing agent among the common halogens.
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