ЁЯУв Too many exams? DonтАЩt know which one suits you best? Book Your Free Expert ЁЯСЙ call Now!

    Question

    Which of the following method can be employed to test

    the Hardness of Water?
    A Sublimation Correct Answer Incorrect Answer
    B Distillation Correct Answer Incorrect Answer
    C Formation of lather with soap Correct Answer Incorrect Answer
    D Saponification Correct Answer Incorrect Answer

    Solution

    Hardness of water is due to calcium and magnesium ions. Sodium salts dissolve in water and hence lather is formed. When soap is added to hard water, calcium and magnesium ions replaces sodium (or potassium) ions in the soap and gets precipitated hence lather formation is hindered. Thus, this method can be employed to test the hardness of water.

    Practice Next
    More General science Common Questions

    Relevant for Exams:

    ask-question