Which of the following is a physical method of decontamination?

Pressure application is a recognized physical method of decontamination. This technique involves using physical force, often in the form of water jets or steam, to remove contaminants, dirt, and microorganisms from surfaces. The mechanism relies on the physical impact of pressure to disrupt and dislodge substances that may be presenting a risk of infection or contamination. This is particularly significant in environments that require stringent hygiene standards, such as in healthcare settings.

In contrast, the other options pertain to different types of decontamination methods. Alcohol application and chemical disinfection refer to chemical methods that utilize substances to kill or inhibit pathogens. Washing with soap represents a combination of physical and chemical cleaning, where the mechanical action of scrubbing with soap aids in removing dirt and microbes while the soap itself has a chemical action. The focus on pressure application as a standalone physical method allows for targeted removal of contaminants without relying on chemicals.