Among the molecules (I) XeO₃ ; (II) XeOF₄ ; (III) XeF₆, those having same number of lone pairs on Xe are

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I & II only

I & III only

II & III only

I, II, III

answer is D.

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Detailed Solution

(i) In XeO₃, 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.

(ii) In XeOF₄, Xe contains 8 electrons in its valence shell, 6 of which are used in bonding with one 'O' and 4 F atoms and 2 electrons remains unbonded as a lone pair.

(iii) In XeF₆, 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.

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