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Why iodine less reactive than chlorine

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Why iodine less reactive than chlorine

Posted by Zakir Hussain 5 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 8 months ago

Chlorine has a higher effective nuclear charge, and therefore should be more oxidizing than iodine.
The nuclear charge of chlorine is less shielded by intervening electrons. Thus chlorine gas should be a better oxidant.
If we turn to reduction potentials, which we should do as scientists because scientists must utilize quantitative data, we find:<mathjax>
1/2 Cl₂+e⁻→Cl⁻</mathjax><mathjax>E^∘=1.36
1/2 I₂+e⁻→I⁻</mathjax> <mathjax>E^∘=0.54</mathjax>
How is this consistent with the given proposition?

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