Sentence:  These estimates indicated that the quantum yield for the exchange of chlorine with liquid <WSD>carbon</WSD> tetrachloride at 65 ` is of the order of magnitude of unity . 
Meaning of the word marked with <WSD> tags:  a colorless nonflammable liquid used as a solvent for fats and oils; because of its toxicity its use as a cleaning fluid or fire extinguisher has declined