Question: When an electric current is passed through water (H_{2}O) using a specific apparatus, hydrogen (H_{2}) and oxygen (O_{2}) gases form. How can this reaction be shown in a chemical equation?

  Options: 
 A. H_{2}O -> H + O + H
 B. 2H_{2}O(l) -> 2H_{2}(g) + O_{2}(g)
 C. H:O:H -> H_{2}O
 D. H_{2}O(l) -> 2H(g) + O(g) 
Answer: B