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Moist heat, dry heat and radiation are classified together as

  • A.antiseptics
  • B.surfactants
  • C.physical agents
  • D.chemical agents

Answer: C

Correct answer: physical agents

The classification divides sterilising and disinfecting agents into physical - heat in its moist and dry forms, radiation, filtration - and chemical, such as alcohols, aldehydes, halogens and gases. Antiseptics and surfactants are subcategories of the chemical group, so neither can contain heat and radiation.

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