Question

Assertion : Xenon forms fluorides. 

Reason : Because 5d-orbitals are available for valence shell expansion.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

Answer 1

The correct option is (a) Both A and R are true and R is the correct explanation of A.

Explanation:

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 O₂ ----> O₂⁺ + e^-. Also, due to the presence of empty 5d-orbitals, electrons can be excited and higher valency of xenon can be produced. e.g., XeF₂, XeF₄, XeF₆ etc.