(a) Draw the structures of the following molecules :
(b) Explain the following observations :
(i) is more acidic than
(ii) Fluorine does not exhibit any positive oxidation state.
(iii) Helium forms no real chemical compound.
(a) (i) :
(b) (i) is more acidic than because bond dissociation enthalpy of H-S bond in is less than that of H-O bond in
(ii) F is the most electronegative element. It has no d-orbitals and therefore, there is no scope for any electron promotion. So it can only show oxidation state of -1 in its compounds.
(iii) Helium has very high ionisation enthalpy and no vacant d-orbitals, therefore no chemical compound of helium is known.