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Question

Going down in a group from fluorine to iodine, which of the following properties decreases?

A
Ionic radius
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B
Ionisation energy
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C
Oxidising power
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D
Electronegativity
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Solution

The correct options are
B Ionisation energy
C Oxidising power
D Electronegativity
As we move down the group, i.e., from fluorine to iodine, electronegativity, ionisation energy and oxidising power of halogens decrease but ionic radius increases.
Fluorine is the most electronegative element.

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