a
copper and zinc
b
magnesium and silver
c
calcium and magnesium
d
potassium and tin
e
sodium and lead
Explanation
Correct Option
cNo explanation available
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noni222
2 years ago
Hard water contains high amounts of minerals in the form of ions, especially the metals calcium and magnesium, which can precipitate out and cause problems in water cconducting or storing vessels like pipes.
