Question

Assertion : $Al$ forms $[Al{F}_6{]}^{3-}$ but B does not form $[B{F}_6{]}^{3-}$.
Reason : $B$ does not react with $F_2$.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (C)

$B$ does not have vacant $d$ -orbitals (sub-shell) as its valence shell.