JEE Main & Advanced JEE Main Solved Paper-2017

  • question_answer
    Both lithium and magnesium display several similar properties due to the diagonal relationship ; however, the one which is incorrect is:                           JEE Main Solved Paper-2017

    A)  Both form basic carbonates

    B)  Both form soluble bicarbonates

    C)  Both form nitrides

    D)  Nitrates of both Li and Mg yield\[\text{N}{{\text{O}}_{\text{2}}}\] and \[{{\text{O}}_{\text{2}}}\]on heating

    Correct Answer: A

    Solution :

     Mg can form basic carbonate like \[5M{{g}^{+2}}+6CO_{3}^{2-}+7{{H}_{2}}O\] \[\to 4MgC{{O}_{3}},Mg{{(OH)}_{2}}.5{{H}_{2}}O\downarrow +2HCO_{3}^{-}\] While Li can form only carbonate \[(L{{i}_{2}}C{{O}_{3}})\] not basic carbonate.


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