Chemistry - Environmental Chemistry Question with Solution | TestHub

ChemistryEnvironmental ChemistryWater PollutionMedium2 minQB

ChemistryMediumsingle choice

Permanent hardness of water is due to presence of following ion -

Options:

Answer:

Solution:

Permanent hardness of water is caused by dissolved sulfates and chlorides of calcium and magnesium. Calcium sulfate ( $C a S O_{4}$ ) and magnesium sulfate ( $M g S O_{4}$ ) are common culprits. Calcium bicarbonate ( $C a (H C O_{3})_{2}$ ) causes temporary hardness. Therefore, both A and B contribute to permanent hardness.

The final answer is $D$

Stream:JEESubject:ChemistryTopic:Environmental ChemistrySubtopic:Water Pollution

⏱ 2mℹ️ Source: QB

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