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KVPY2019ChemistryHydrogen

Treatment with lime can remove hardness of water caused by

Options

  1. ACaCl 2
  2. BCaSO 4
  3. CCa HCO 3 2
  4. DCaCO 3

Correct answer

C. Ca HCO 3 2

Step-by-step solution

Temporary hardness (caused by bicarbonates of calcium or magnesium) can be removed by using lime, Ca ( OH ) 2 Ca HCO 3 2 + Ca ( OH ) 2 ⟶ 2 CaCO 3 + 2 H 2 O

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