Q.) Which of the following correctly represents a balanced chemical equation?
(a) Fe(s) + 4H2O(s) → Fe3O4(s) + 4H2(g)
(b) 3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g)
(c) 3Fe(s) + H2O(g) → Fe3O4(s) + H2(g)
(d) 3Fe(s) + 4H2O(g) → Fe3O4(s) + H2(g)
Ans. (b) 3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g)
Explanation: A balanced chemical equation has an equal number of atoms of different elements in the reactants and products in accordance with the law of conservation of mass. Number of atoms of each element in reactant side should be equal to the number of atoms of the elements in product side. The number of atoms of elements in reactant side and product side in the equation:
