Final answer:
B) 1:10 The appropriate dilution of sodium hypochlorite solution for general disinfection of porous surfaces is at a 1:10 ratio, which means one part bleach to nine parts water.
Step-by-step explanation:
The appropriate dilution of sodium hypochlorite solution for general disinfection, especially on porous surfaces, is a 1:10 ratio. This means one part bleach is mixed with nine parts water to form the disinfecting solution.
To make this clearer, if you are using a bleach that is at a concentration of 7.4% sodium hypochlorite by mass, you will dilute it in the said ratio.
This dilution provides a strong enough solution to effectively kill germs and pathogens while being safe enough to minimize damage to the surface being disinfected and reduce the risk for those applying the solution.
It is important to accurately measure both the sodium hypochlorite solution and the water when creating this mixture to ensure the ratio remains 1:10, which is critical for efficacy and safety.
This ratio is recommended by various health organizations for disinfecting against a wide array of microorganisms and is often required in healthcare settings to ensure high levels of hygiene.