Michael Faraday didn't actually liquefy chlorine. He liquefied chlorine gas in 1823, but it was not his discovery.

Here's the breakdown:

* Humphry Davy (Faraday's mentor) was the first to liquefy chlorine gas in 1810 by pressurizing it in a sealed glass tube.

* Faraday's contribution was refining the process and demonstrating it to the scientific community. He used a combination of pressure and cold to liquefy chlorine, and he also successfully liquefied several other gases, including ammonia, hydrogen sulfide, and carbon dioxide.

Therefore, Faraday's work played a crucial role in establishing the liquefaction of gases as a significant scientific phenomenon.