Which of the following metal has stable carbonates 

  1. A

    Na 

  2. B

    Mg 

  3. C

    Al 

  4. D

    Si 

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    Solution:

    When carbonates are heated they decompose to form the oxide. Sodium carbonate and potassium carbonate do not decompose. The carbonate become more difficult to decompose as we go down the group. 

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