Sea water is the greatest source of some halogens. Comment. – InterviewSolution

1.	Sea water is the greatest source of some halogens. Comment.
Answer» Sea water contains chlorides, bromides and iodides of sodium, potassium, magnesium, calcium but its main constituent is sodium chloride (2.5% by mass) dried up sea weeds contain sodium chloride and carnallite [KCI MgCl₂. 6H₂O]. Certain seaweeds contain up to 0.5% of iodine as sodium iodide and chili saltpetre (NaNO₃) contains up to 0.2.% of sodium iodide. Thus sea is the greatest source of halogens.

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