Hardness of water is caused by the presence of ions of

a

magnesium and silver

b

calcium and magnesium

c

sodium and potassium

d

calcium and sodium

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Explanation

Correct Option
b

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Discussions (4)

tyjesma
11 years ago

Hardness in water is caused by Ca2+ and Mg2+

Sulef
6 years ago

Hardness of water is caused by Ca*2 and Mg*2

DesmondBuwaX
1 week ago

Soo what the ans cos I choosed b and I falled it

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