7.13     List the important sources of sulphur.

Answers (1)
  • The presence of sulphur in the earth’s crust is only about  0.03-0.1%.
  • mixed sulphur exists primarily as sulphates such as gypsum CaSO_4.2H_2O , Epsom salt MgSO_4.7H_2O, baryte BaSO_4.
  • another source is by sulphides such as galena PbS, zinc blende ZnS, copper pyrites CuFeS_2. some sulphur also occurs as hydrogen sulphide in volcanoes.  eggs, proteins, garlic, onion, mustard, hair and wool also contain sulphur.

 

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