JEE Main · 2024 · 27 Jan 2024 · Shift 1 · p-Block Elements

Element not showing variable oxidation state is :

(A)Bromine
(B)Iodine
(C)Chlorine
(D)Fluorine✓ Correct

Answer: (D)

Solution

Fluorine is restricted to an oxidation state of

- 1

: it is the most electronegative element and has no accessible

d

-orbitals to expand its valence shell. The heavier halogens (Cl, Br, I) have low-lying

d

-orbitals available, which lets them show variable positive oxidation states (

+ 1, + 3, + 5, + 7

) in oxoacids and interhalogens.

JEE Main · 2024 · 27 Jan 2024 · Shift 1 · Single correct option

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