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Question

Which is the least reactive element in group 17?


A
Fluorine
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B
Chlorine
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C
Iodine
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D
Bromine
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Solution

The correct option is C Iodine

Iodine has the largest radius among halogens. Due to this, the attractive force offered by it towards the last shell orbit is very low. This has very low electronegativity which results in its low reactivity among halogens.


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