1.

Write balanced equations for the reaction of :(i) Aluminium when heated in air. Write the name of the product.(ii) Iron with steam. Name the product obtained'(iii) Calcium with water. Why does calcium start floating in water?

Answer»

(i) 4Al + 3O2 →  2Al2O3, Aluminium oxide 

(ii) 3Fe + 4H2O → Fe3O4 + 4H2, Ferric oxide 

(iii) Ca + 2H2O → Ca(OH)2 + H2, because hydrogen sticks to calcium.



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