Question

4Fe + 3O2 + xH2O → 2Fe2O3 • xH2O
The formation of rust (equation above) is an example of both combustion and

a] Synthesis
b] decomposition
c] single replacement
d] double relacement

Answer 1

The answer is synthesis

Answer 2

The formation of rust (equation above) is an example of both combustion and

a] Synthesis

What is synthesis reaction ?

A synthesis reaction is a type of reaction in which multiple reactants combine to form a single product .  

If we observe the equation , no replacement is taking place hence , single and double replacement are wrong options .

In decomposition reaction their is only one reactance which get decompose and form multiple product , hence option b) decomposition will be wrong option

correct option will be a) synthesis

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