1.

Writeequation for the reactions of (i) iron with steam (ii) calcium and potassium with water.

Answer»

Solution :(i) Iron with steam:`4H_2O(g) + 3FE(s) to Fe_3O_4 + 4H_2(g)`
(ii) calcium and potassium with WATER :
`Ca(s) + underset("cold water")(2H_2O(l))to Ca (OH)_2 + H_2O (g) + ` heat ENERGY
`2K(s) + underset("cold water")(2H_2O(l)) to 2KOH (AQ) + H_2(g) + `heat energy


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