Question

Among the following molecules:
(i) $Xe{O}_3$
(ii) $XeO{F}_4$(iii) $Xe{F}_6$
those having same number of lone pairs on Xe are:

• A. (i) and (ii) only.
• B. (i) and (iii) only.
• C. (ii) and (iii) only.
• D. (i), (ii) and (iii).

Answer 1

The correct option is D (i), (ii) and (iii).

(i) In $Xe{O}_3$, $Xe$ contains 8 electrons in its valence shell, 6 of which are used in bonding with 3 $O$ atoms and 2 electrons remains unbonded as a lone pair.

(i) In $XeO{F}_4$, $Xe$ contains 8 electrons in its valence shell, 6 of which are used in bonding with 1 $O$ and 4 $F$ atoms and 2 electrons remains unbonded as a lone pair.

(i) In $Xe{F}_6$, $Xe$ contains 8 electrons in its valence shell, 6 of which are used in bonding with 6 $F$ atoms and 2 electrons remains unbonded as a lone pair.

So, each of them contain a lone pair of electrons.

So, the correct option is D.