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It is also called as hard water.

a.Seawater b. freshwater c. groundwater


Sagot :

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It is also called as hard water.

✏️ a.Seawater

explanation

  • hard water, water that contains salts of calcium and magnesium principally as bicarbonates, chlorides, and sulfates. Ferrous iron may also be present; oxidized to the ferric form, it appears as a reddish brown stain on washed fabrics and enameled surfaces.