10th Class Science Solved Paper - Science-2016 Outside Delhi Set-I

  • question_answer 27)
    In the neighbourhood of your school, hard water required for an experiment is not available. Select from the following groups of salts available in your school, a group each member of which, if dissolved in distilled water, will make it hard:
    (a) Sodium chloride, calcium chloride
    (b) Potassium chloride, sodium chloride
    (c) Sodium chloride, magnesium chloride
    (d) Calcium chloride, magnesium chloride

    Answer:

    (d) Calcium chloride, magnesium chloride


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