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Assertion:Boron can only form [BF(4)]^(-...

Assertion:Boron can only form `[BF_(4)]^(-)`,whereas aluminium forms`[AIF_(6)]^(3-)`.
Reason:Ionization enthalpy increases across a period.

A

If both assertion and reason is the correct explanation of assertion.

B

If both assertion and reason is the correct explanation of assertion.

C

If both assertion and reason is the correct explanation of assertion.

D

If both assertion and reason is the correct explanation of assertion.

Text Solution

Verified by Experts

The correct Answer is:
B
The maximum covalency of first member of each group of s-andp-block elements is 4,(due to non-availability of d-orbitals)Whereas the other member can expand their valence shell to accommodate more than four pairs of electrons (due to availability of d-orbitals).
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