Which of the following represents the chemical reaction of aluminum and ferric oxide to produce iron and aluminum oxide? a. aluminum + ferric oxide → iron + aluminum oxide b. iron + aluminum oxide → aluminum + ferric oxide c. aluminum oxide + ferric oxide → iron + aluminum d. iron + ferric oxide → aluminum + aluminum oxide

Option A is correct. Over all reaction is as follow,

                             Fe₂O₃ (s) + 2 Al (s) → 2 Fe (s) + Al₂O₃ (s)
Explanation:
                   Here we are having two metals, Iron and Aluminium. Aluminium is very reactive than Iron and it is above Iron in the reactivity series. 
                   This reaction has great importance in welding Iron on other metals, like welding Railway tracks. When Ferric Oxide is mixed with Aluminium metal and a spark is given, a vigorous exothermic reaction starts. The temperature reaches approximately 2000°C and Iron with melting point 1535 °C melts and is used for welding purpose. Such type of reaction is called as Thermite Reaction.

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