AlF3 is soluble in HF only in presence of KF. It is due to the formation of
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a
K3AlF3H3
b
K3AlF6
c
AlH3
d
KAlF3H
answer is B.
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Detailed Solution
AlF3 is insoluble in anhydrous HF because the F- ions are not available in hydrogen bonded HF but, it becomes soluble in presence of little amount of KF due to formation of complex, K3AlF6AlF3+3KF⟶K3AlF6