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Hardness of water is mainly due to the presence of

Chemistry
JAMB 2011

Hardness of water is mainly due to the presence of

  • A. calcium hydroxide or magnesium hydroxide
  • B. calcium trioxocarbonate (IV) or calcium tetraoxosulphate (VI)
  • C. sodium hydroxide or magnesium hydroxide
  • D. calcium chloride or sodium chloride salts
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Correct Answer: Option B
Explanation

Salts of Calcium and Magnesium are responsible for hardness of water. Bicarbonates, Carbonates, Chlorides and Sulfates of Calcium and Magnesium causes temporary and permanent hardness.

There is an explanation video available below.

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