Q55 / 200 · Manipal (MET) 2012 · Chemistry

Which of the following is responsible for hardness of water?

  • A
    $\mathrm{CaHCO}_3$
  • B
    $\mathrm{CaCl}_2$
  • Correct answer
    C
    Both (a) and (b)
  • D
    None of these

Solution

Temporary hardness of water is due to the presence of bicarbonates of calcium and magnesium while permanent hardness is due to the presence of soluble chlorides and sulphates of calcium and magnesium.

Hence, the correct answer is option: 'C'.

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