1.

Assertion: Al forms [AlF_6]^(3-)but B does not form [BF_6]^(3-) Reason: B does not react with fluorine.

Answer»

If both assertion and reason are TRUE and reason is the CORRECT EXPLANATION of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is FALSE.
If both assertion and reason are false.

Solution :B does not have vacant d-orbitals (sub-shell) as its VALENCE shell.


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