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Q 2676178076.     (a) Account for the following:
(i) Helium is used in diving apparatus.
(ii) Fluorine does not exhibit positive oxidation state.
(iii) Oxygen shows catenation behavior less than sulphur.
(b) Draw the structures of the following molecules:
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)