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The metallic constituents of hard water are

1 Magnesium, calcium and tin

2 Iron, tin and calcium

3 Calcium, ,magnesium and iron

4 None of these



The metallic constituents of hard water are 1 Magnesium, calcium and tin 2 Iron, tin and calci..

Answer / guest

(3) Calcium, ,magnesium and iron

Is This Answer Correct ?    31 Yes 3 No

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