Answers

2014-02-28T08:07:58+05:30
It also contains salts of different compouds an hence is not pure ;-)
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2014-03-06T14:39:18+05:30
A pure substance is a compound whose elements are combined in fix proportions.

sea water is a mixture of salts dissolved in water therefore it is not a pure substance whereas distilled water is a pure substance
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