# NEET Chemistry The p-Block Elements (XII) Questions Solved

BOARD

Explain the following :

(a) Xenon does not form such fluorides as $Xe{F}_{3}$ and $Xe{F}_{5}$.

(b) Out of noble gases, only Xenon is known to form real chemical compounds.

(a) By impairing of one paired orbital, two singly occupied orbitals come into existence. Thus, either two or four or six singly occupied orbitals can be formed instead of one, three or five singly occupied orbitals. Hence $XeF$ are not formed.

(b) $Xe$ atom has a large size and lower ionisation potential and hence the force of nucleus over the electrons is weak and hence very small energy can excite the electrons and hence it is easier for Xenon to form compounds than other noble gases.

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