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Q.

The composition of residual mixture will be if 30 g of Mg combines with 30 g of oxygen

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a

40g Mg +20g O2

b

45g MgO+15g O2

c

50 g MgO+10g O2

d

60g MgO only

answer is C.

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Detailed Solution

Mg+12O2→MgO

24 gram Mg = 16 gram O2=40 grams MgO

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