Oxides of sulphur \[(S{{O}_{2}},S{{O}_{3}})\]are due to

1.	Oxides of sulphur \[(S{{O}_{2}},S{{O}_{3}})\]are due to
A.	burning of sulphur containing fossil fuel
B.	roasting and smelting of sulphide ore
C.	oxidation by air, \[{{H}_{2}}{{O}_{2}}\] and \[{{O}_{3}}\]
D.	All of the above
Answer» E.

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Oxides of sulphur \[(S{{O}_{2}},S{{O}_{3}})\]are due to

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