General Science • ChemistryEasy
Which of the following compounds is used as an effective germicide and disinfectant for purifying drinking water supplies?
A. Calcium sulfate
B. Bleaching powder✓ Correct Answer
C. Sodium carbonate
D. Zinc sulfide
💡 Solution & Explanation
Bleaching powder chemically functions as calcium oxychloride, releasing active chlorine upon reacting with moisture to serve as an effective disinfectant for municipal water treatment systems. Incorrect chemical compounds listed in the options do not possess equivalent germicidal and oxidizing properties for pathogen destruction. Residual chlorine prevents microbial contamination during distribution.
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