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10th Class Science Carbon and its Compounds / कार्बन और उसके यौगिक Question Bank Self Test-8

  • question_answer
    Which element is present in hard water?

    A)  Potassium Salt

    B)  Sulphur

    C)  Calcium Salt

    D)  Chlorine

    E)  None of these

    Correct Answer: C

    Solution :


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