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Question 760007
JEE Chemistry · Medium

p-Block Elements: Halogens MCQ

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HalogensMediumQuestion 760007

Question

The correct order of oxidising power of halogens is:
  1. A
    F₂ > Cl₂ > Br₂ > I₂
    Correct
  2. B
    I₂ > Br₂ > Cl₂ > F₂
  3. C
    Cl₂ > F₂ > Br₂ > I₂
  4. D
    F₂ > I₂ > Br₂ > Cl₂

Correct answer

F₂ > Cl₂ > Br₂ > I₂

Explanation

Oxidising power of halogens decreases down Group 17 as electronegativity and reduction potential decrease: F₂ (E° = +2.87 V) > Cl₂ (+1.36 V) > Br₂ (+1.07 V) > I₂ (+0.54 V).

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