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List the important sources of sulphur....

List the important sources of sulphur.

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Occurrence or sources of sulphur in the earth's crust, percentage of sulphur is only 0.03 to `0.1%`. In combined state, it occurs
(i) In the form of sulphates, eg., gypsum `(CaSO_(4).2H_(2)O)`. epsom salt `("MgSO"_(4).7H_(2)O)`, baryte `("BaSO"_(4))`
(ii) In the form of sulphates, eg., gypsum (PbS), zinc blende (ZnS), Copper pyrites `("CuFeS"_(2))`. In volcanoes, traces of sulphaur occur as `H_(2)S`. In orgainc materials such as eggs, proteins, garlic, onion, mustard, hair and wool, sulphur is present in trace amounts.
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Passage - II : Sulphur forms hexahalides, tetrahalides, dihalides and monohalides, sulphur forms only hexa fluorides but not hexachlorides, hexa bromides and hexaiodides. Sulphur halides tend to hydrolyse easily. Sulphur hexa fluorides is an exception. Of the oxohalides, the most important are those of sulphur especially sulphur dichloride oxide (Thionyl chloride) SOCl_(2) and sulphurdichloride dioxide (Sulphuryl chloride) SO_(2)Cl_(2) these are also hydrolyse in water SO_(2)Cl_(2) is dissolved in H_(2)O which of the following statement is wrong about the solution

Passage - II : Sulphur forms hexahalides, tetrahalides, dihalides and monohalides, sulphur forms only hexa fluorides but not hexachlorides, hexa bromides and hexaiodides. Sulphur halides tend to hydrolyse easily. Sulphur hexa fluorides is an exception. Of the oxohalides, the most important are those of sulphur especially sulphur dichloride oxide (Thionyl chloride) SOCl_(2) and sulphurdichloride dioxide (Sulphuryl chloride) SO_(2)Cl_(2) these are also hydrolyse in water SF_(6) do not hydrolyse water because

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