Q.
Which of the following fluorides does not exist ?
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a
NF5
b
PF5
c
AsF5
d
SbF5
answer is A.
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Detailed Solution
Nitrogen does not have empty d orbitals. Hence it is unable to form more than 4 bonds. Hence, NF5 doesn't exist but all other pentafluorides of 15 group elements exist as they have vacant d-orbitals.
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