2. Sample Papers
  3. 6th Class
  4. Science

6th Class Science Sample Paper Science Olympiad Model Test Paper-14

  • question_answer
    Which of the following increases the temporary hardness of water?

    A) Calcium hydrogen carbonate

    B) Magnesium hydrogen carbonate

    C) Calcium

    D) Both (a) and (b)

    E) None of these

    Correct Answer: D

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