Q.

Magnesium burns in air to produce?


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a

MgOand MgN   

b

MgO2 and Mg3N2 

c

MgOand Mg3N2   

d

Mg2and Mg3N2 

answer is C.

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Detailed Solution

        Group II element magnesium has a reactive character.
Mg reacts with O2 from the air;
2Mg+O22MgO
        Here, O accepts the 2 electrons that Mg can contribute because it is a group II element, forming the combination MgO.
N2 is also present in air. Mg thus reacts with N2 as;
3Mg+N2Mg3N2
 
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