Condensing oxygen to a liquid state is indeed possible, but it is a highly specialized and potentially dangerous process that requires equipment and expertise beyond what is available in a typical household freezer.
Oxygen exists as a gas at room temperature and atmospheric pressure. To condense it into a liquid, you need to subject it to very low temperatures and high pressures. Oxygen's boiling point is approximately -183 degrees Celsius (-297 degrees Fahrenheit), so you need to cool it well below this temperature to reach the liquid state.
Household freezers are not designed to reach such extremely low temperatures. Most home freezers can only reach temperatures around -18 to -24 degrees Celsius (0 to -11 degrees Fahrenheit), which is far above the boiling point of oxygen. Additionally, compressing gases to the required high pressures is not feasible with standard household appliances.
Condensing oxygen requires specialized equipment such as cryogenic systems and high-pressure vessels. These setups are complex, expensive, and must be handled with great care due to the risks associated with handling extremely cold substances and high-pressure gases.
In summary, condensing oxygen to a liquid state is not possible with a standard home freezer. It is a process best left to professional laboratories and industrial facilities that have the necessary expertise and safety measures in place.