AIIMS 2015 Chemistry Question Paper for free online practice with solutions

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Question : 24 of 60
 
Marks: +1, -0
One mole of magnesium in the vapour state absorbed 1200 kJ mol−1 energy. If the first and second ionisation energies of Mg are 750 and 1450 kJ mol−1 respectively, the final composition of the mixture is
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