Question

Assertion: Xenon forms fluorides.
Reason: Because 5d-orbitals are available for valence shell expansion.

• A. If both Assertion and Reason are true, and Reason is a correct explanation of the Assertion
• B. If both Assertion and Reason are true, but Reason is not a correct explanation of the Assertion
• C. If Assertion is true, but Reason is false
• D. If both Assertion and Reason are false

Answer 1

Answer: (B)

Xenon belongs to noble gases which are considered to be very unreactive. In xenon atom, the ionisation potential of $Xe$ to lose one electron was found to be nearly equivalent that of $O_2\to O_2{}^{+}+e^{-}$. Also, due to the presence of empty $5d$ -orbitals, electrons can be excited and higher valency of xenon can be produced. $e.g.Xe{F}_2,Xe{F}_4,Xe{F}_6$ etc.