Water Technology Engineering Chemistry Quiz
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Questions and Answers

What is the term for water that does not produce lather with soap?

  • Hard water (correct)
  • Permanent hardness water
  • Temporary hardness water
  • Soft water

    • Which minerals are responsible for the formation of hard water?

  • Iron and Zinc
  • Potassium and Sodium
  • Calcium and Magnesium (correct)
  • Chlorine and Fluorine

    • What causes temporary hardness of water?

  • Presence of Ca and Mg bicarbonate (correct)
  • Presence of Ca and Mg sulfate
  • Presence of Fe and Al carbonate
  • Presence of Na and K chloride

    • What is the result of the reaction between hard water and soap?

    <p>Curdy precipitate</p> Signup and view all the answers

    Which method is used for the removal of boiler troubles by internal treatment?

    <p>Calgon treatment</p> Signup and view all the answers

    What is the cause of temporary hardness of water?

    <p>Presence of Ca and Mg bicarbonate</p> Signup and view all the answers

    What is the result of the reaction between hard water and soap?

    <p>Formation of curdy precipitate</p> Signup and view all the answers

    Which method is used for the removal of boiler troubles by internal treatment?

    <p>Calgon treatment</p> Signup and view all the answers

    What is the term for water that does not produce lather with soap?

    <p>Hard water</p> Signup and view all the answers

    Which minerals are responsible for the formation of hard water?

    <p>Ca and Mg</p> Signup and view all the answers

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