Question

Ionisation potential values of noble gases decrease down the group with increase in atomic size. Xenon forms binary fluorides by the direct reaction of elements. Identify the correct statement(s) from below.

• A. Only the heavier noble gases form such compounds
• B. It happens because the noble gases have higher ionisation energies
• C. It happens because the compounds are formed with electronegative ligands
• D. Octet of electrons provide the stable arrangements

Answer 1

Answer: (A), (C)

It happens because the compounds are formed with electronegative ligands
Only the heavier noble gases form such compounds

Options A and C are correct.
(A) Only the heavier noble gases form such compounds as they have relatively lower values of ionisation enthalpies.

(C) It happens because the compounds are formed with electronegative ligands.

Options B and D are incorrect.
(B) Since the noble gases have higher ionisation energies the tendency for compound formation will be lower.

(D) Octet of electrons provides the stable arrangements. During compound formation, the octet is broken and the stability is lost.