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Question: Answered & Verified by Expert
Assertion : $\mathrm{Al}$ forms $\left[\mathrm{AlF}_6\right]^{3-}$ but $\mathrm{B}$ does not form $\left[\mathrm{BF}_6\right]^{3-}$.
Reason : B does not react with fluorine.
Chemistryp Block Elements (Group 13 & 14)AIIMSAIIMS 2009
Options:
  • 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.
Solution:
1083 Upvotes Verified Answer
The correct answer is: If assertion is true but reason is false
B does not have vacant $d$-orbitals (sub-shell) as its valence shell.

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