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Discussion

Chlorine and hypochlorite act as disinfectants because they are

  • A.surface-active detergents
  • B.alkylating agents
  • C.lipid solvents
  • D.strong oxidising agents

Answer: D

Hypochlorous acid oxidises sulphydryl groups and other cell constituents, giving rapid broad-spectrum killing including spores at high strength. Activity falls sharply in the presence of organic matter, so surfaces are cleaned before they are disinfected.

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