Chemistry - Complete s-block Question with Solution | TestHub
ChemistryComplete s-blocks-block IIAMedium2 minQB
ChemistryMediumsingle choice
Permanent hardness of water is due to presence of following ion -
Options:
Answer:
D
Solution:
Permanent hardness of water is caused by the presence of soluble sulphates and chlorides of calcium and magnesium.
CaSO₄ and MgSO₄ are responsible for permanent hardness.
Ca(HCO₃)₂ causes temporary hardness because bicarbonates decompose on heating.
Therefore, permanent hardness is due to both CaSO₄ and MgSO₄.
(D) Both A and B
Stream:JEESubject:ChemistryTopic:Complete s-blockSubtopic:s-block IIA
⏱ 2mℹ️ Source: QB
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