Metal sulphides occur mainly in rocks and metal halides occur in lakes and seas. Give reason. (b) Pine oil is used in froth flatation process. Why ? ( c) What is a depresent ? Give an example. (d) What is the role of stabiliser in froth flotation process ? ( e) What is gangue ?
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Why do metal sulphides occur mainly in rocks and metal halides in lakes and seas?
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