JCECE Engineering JCECE Engineering Solved Paper-2003

  • question_answer
    Which of the following carbonate decompose most easily on heating?

    A) \[R{{b}_{2}}C{{O}_{3}}\]                              

    B) \[{{K}_{2}}C{{O}_{3}}\]

    C)  \[N{{a}_{2}}C{{O}_{3}}\]                             

    D)  \[MgC{{O}_{3}}\]

    Correct Answer: D

    Solution :

    Key Idea: Alkali metals carbonates do not decompose on heating but alkaline earth metal carbonates decompose easily.                 \[MgC{{O}_{3}}\xrightarrow{\Delta }MgO+C{{O}_{2}}\] \[\therefore \]\[MgC{{O}_{3}}\]will decompose most easily among given choices.


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