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Q.

The burning of magnesium metal in the air is an example of ____________ reaction.

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a

double displacement

b

displacement 

c

combination

d

decomposition

answer is C.

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Detailed Solution

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Magnesium metal burns in the air to produce magnesium oxide (MgO).

This reaction is represented as

   2Mg (s)  +  O2 (g)  →  2MgO (s)

In this reaction, two elements (magnesium and oxygen) combine to form a single compound (magnesium oxide), so it is an example of a combination reaction.

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