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Q.

Stable pentahalide of 'Bismuth' is

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a

BiBr5

b

BiCl5

c

BiF5

d

BiI5

answer is A.

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Detailed Solution

Due to inert pair effect 'Bi' is unstable in '+5' state.

But Fluorine, the most EN element can oxidise 'Bi' to its highest ox. state.

∴BiF5 is the only stable pentavalent compound of 'Bi'.

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