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Chemistry
Which one of the following pentafluoride cannot be formed?
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Q. Which one of the following pentafluoride cannot be formed?
BITSAT
BITSAT 2007
A
$PF _{5}$
14%
B
$AsF_5$
19%
C
$SbF_5$
16%
D
$ BiF_5$
52%
Solution:
Bismuth due to inert pair effect exists with only $+3$ oxidation state. $+5$ oxidation state is uncommon for $Bi$. So, bismuth does not form pentahalide.