10th Class Science Metals and Non-metals / धातु और अधातु Question Bank 10th CBSE Science Metals and Non-metals

  • question_answer
      Why are ionic compounds usually hard?                 [CBSE Delhi 2008]

    Answer:

                      In all ionic compounds, their positive and negative ions are attached to each other by a strong ionic bond. So, they are rigid and hard solids.


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