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  • Question

  • Which of the following substances cause temporary hardness in water? 1. Mg(HCO3)2 2. Ca(HCO3)2 3. CaCl2 4. MgSO4


  • Options
  • A. 3 and 4
  • B. 2and 3
  • C. 1 and 4
  • D. 1 and 2

  • Correct Answer
  • 1 and 2 

    Explanation

    There are two types of water hardness: temporary and permanent hardness. Temporary hardness is due to the presence of calcium hydrogen carbonate Ca(HCO3)2(aq) and magnesium hydrogen carbonate Mg(HCO3)2(aq).

    • Tags: Bank Exams

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