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CET Karnataka Medical CET - Karnataka Medical Solved Paper-2001

  • question_answer
    \[1.5\] moles of \[{{O}_{2}}\] combine with \[Mg\] to form the oxide \[MgO\]. The mass of \[Mg\]that has combined is \[(Mg=24)\]:

    A)  \[72g\]         

    B)  \[36g\]

    C)  \[48g\]          

    D)  \[24g\]

    Correct Answer: A

    Solution :

    \[2Mg+{{O}_{2}}\xrightarrow{{}}2MgO\] \[\because \]  1 mole of oxygen is combined with 2 mole of \[Mg\] to produce \[MgO\] Hence \[2\times mol\] wt. of \[Mg\] \[=2\times 24=48\] \[\therefore \] 1.5 mole of oxygen combines with \[=1.5\times 40=6gm\].


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