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Byju's Answer
Standard VII
Chemistry
Temporary Hardness
Which of thes...
Question
Which of these is a salt that does not cause hardness in water
(a) Na
2
SO
4
(b) Ca(HCO
3
)
2
(c) CaSO
4
(d) MgSO
4
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Solution
(a) Na
2
SO
4
Hardness in water is most commonly caused by bicarbonates and sulphates of calcium and magnesium.
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