Single Answer MCQ
Q-00001514
Write the equations for the reactions of iron with steam and calcium and potassium with water.
1
Fe + H2O -> FeO + H2, Ca + H2O -> CaO + H2, K + H2O -> KOH + H2
2
Fe + H2O -> Fe3O4 + H2, Ca + H2O -> Ca(OH)2 + H2, K + H2O -> KOH + H2
3
Fe + H2O -> Fe(OH)3 + H2, Ca + H2O -> CaO + H2, K + H2O -> KOH + H2
4
Fe + H2O -> Fe2O3 + H2, Ca + H2O -> Ca(OH)2 + H2, K + H2O -> KOH + H2
Answer and Solution
Answer
B. Fe + H2O -> Fe3O4 + H2, Ca + H2O -> Ca(OH)2 + H2, K + H2O -> KOH + H2
Solution:
The equations for the reactions are: Iron with steam - 3Fe + 4H2O -> Fe3O4 + 4H2, Calcium with water - Ca + 2H2O -> Ca(OH)2 + H2, Potassium with water - 2K + 2H2O -> 2KOH + H2.
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