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Question

Which among the following compounds are responsible for the hardness of water?

A
Ca(HCO3)2
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B
Mg(HCO3)2
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C
Mg(CO3)
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D
Ca(CO3)
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E
Mg(Cl)2
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F
Na(HCO3)
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G
Na2(CO3)
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H
NaCl
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Solution

The correct option is E Mg(Cl)2

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