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Answer the following with relevant reaso...

Answer the following with relevant reason.
(i)Xenon has closed shell configuration but is known to give compounds with fluorine.
(ii)The boiling points of noble gases increase with increase in atomic number.
(iii)Why helium and neon do not form clathrate compounds with quinol ?

Text Solution

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The correct Answer is:
(i)Xe has relatively lower ionisation energy among inert gases and thus the outermost shell electrons of Xe are excited to d-subshell and thereby showing unpaired electronic structure.Therefore Xe shows covalent bonding with fluorine showing sharing of electron pair.
(ii)Van der Waal's forces of attraction among molecules increase with their increase of atomic masses.Thus, higher energy is required to separate these molecules as to get gaseous state.Hence, the boiling points increase with increase of atomic masses.
(iii)The size of cavities formed during crystallisation of quinol is more than the size of helium and neon atoms.
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