Assertion (A) :Boron is unable to form ${BF}_{6}^{3 -}$
Reason (R): Size of B is very small.

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If both Assertion (A) and Reason(R)are correct, but Reason (R) is not the correct explanation of Assertion (A)

If Assertion (A) is incorrect but Reason (R) is correct

If Assertion(A) is correct but Reason (R) is incorrect

If both Assertion (A) and Reason(R)are correct, but Reason (R) is the correct explanation of Assertion (A)

answer is A.

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Detailed Solution

Boron cannot extend its maximum covalency 4 due to absence of vacant d- orbitals.

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