Why should disinfectants be kept away from incompatible chemicals?

• A. To prevent dangerous chemical reactions that could release harmful fumes or reduce efficacy.
• B. To save space.
• C. To mix them later for stronger solutions.
• D. There is no risk.

Answer: (A)

Disinfectants must be kept away from incompatible chemicals to prevent dangerous chemical reactions that can release toxic fumes or neutralize the disinfectant, reducing its effectiveness. For example, bleach (sodium hypochlorite) mixed with acids or ammonia can produce chlorine gas, a toxic and irritating substance to breathe. Some combinations can react violently or form new, unpredictable compounds, posing safety risks and undermining sanitation. The point is safety and reliable disinfection, not saving space or mixing later; there is real risk when incompatible chemicals are combined.