Q36 / 160 · WBJEE 2015 · Chemistry
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.
- Correct answerAOnly the heavier noble gases form such compounds
- BIt happens because the noble gases have higher ionisation energies
- Correct answerCIt happens because the compounds are formed with electronegative ligands
- DOctet of electrons provide the stable arrangements
Solution
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.
The reason is that only the heavier noble gases form such compounds. Octet of electrons provide the stable arrangements but this statement is not very much valid in cases of higher element which can be ionised easily due to large distance between nucleus and valence electrons.
Hence, the correct answer is options: 'A', 'C'.