List the important sources of sulphur.

1.	List the important sources of sulphur.
Answer» Sulphur occurs in the earth’s crust in the combind state primarily in the form of sulphates and sulphides. (i) As sulphates: Gypsum, (CaSO₄.2H₂O), Epsom salt (MgSO₄ 7H₂O), Baryte (BaSO₄) etc. (ii) As Sulphides: Galena (PbS), Zine blende (ZnS), Copper pyrites (CuFeS₂), Iron pyrites (FeS₂) etc. Traces of sulphur occur as H₂S and in organic matter such as eggs, proteins, onion, mustard, hair and wool etc.

Answer»

Sulphur occurs in the earth’s crust in the combind state primarily in the form of sulphates and sulphides.

(i) As sulphates: Gypsum, (CaSO₄.2H₂O), Epsom salt (MgSO₄ 7H₂O), Baryte (BaSO₄) etc.

(ii) As Sulphides: Galena (PbS), Zine blende (ZnS), Copper pyrites (CuFeS₂), Iron pyrites (FeS₂) etc.

Traces of sulphur occur as H₂S and in organic matter such as eggs, proteins, onion, mustard, hair and wool etc.

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