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Q.

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
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