1.

Give reason for the following:Most of the known noble gas compounds are those of Xe.Write formula of any oxoacid of sulphur.Sulphur has higher tendency for catenation than O or Se.

Answer»
  1. Xenon is largest in size among all the noble gas atoms and hence it has lowest ionisation energy, as a result of which most of the compounds are of xenon only.
  2. In oxygen there is lone pair-lone pair repulsion, so weaker O-O bond. Also, the single bond between Se-Se is weaker due to larger size of Se-atom. Sulphur of being suitable size makes stronger S-S bond and hence shows maximum catention property.
  3. H2SO4


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