Sentence:  In addition to the method described in the section above , chlorine and radiochlorine were prepared by the <WSD>electrolysis</WSD> of a * * f eutectic on the vacuum line , and by exchange of * * f with molten * * f . 
Meaning of the word marked with <WSD> tags:  (chemistry) a chemical decomposition reaction produced by passing an electric current through a solution containing ions