A) \[2Al+F{{e}_{2}}{{O}_{3}}\xrightarrow[{}]{heat}A{{l}_{2}}{{O}_{3}}+2Fe+Heat\]
B) \[2Na+C{{l}_{2}}\to 2\,NaCl\]
C) \[{{P}_{2}}{{O}_{5}}+3{{H}_{2}}O\xrightarrow{{}}2{{H}_{3}}P{{O}_{4}}\]
D) \[2\,PbS+3{{O}_{2}}\xrightarrow[{}]{heat}PbO+3S{{O}_{2}}\]
Correct Answer: A
Solution :
When aluminium powder is heated with iron oxide, an exothermic reaction takes place with the formation of aluminium oxide and iron metal.
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