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Q: Which of the following chemical is used in the gaseous method of sterilisation?
  • A. Ethylene oxide
  • B. Formaldehyde
  • C. Cresol
  • D. Phenol
Correct Answer: Option A - The most widely used gaseous sterilization agent is ethylene oxide (C₂H₄O), which kills by alkylation of the nucleic acid within the micro-organism. The range of lethal concentration begins near 300 mg/L and extends to approximately 1200 mg/L a higher levels have not been shown to result in substantially shorter process times.
A. The most widely used gaseous sterilization agent is ethylene oxide (C₂H₄O), which kills by alkylation of the nucleic acid within the micro-organism. The range of lethal concentration begins near 300 mg/L and extends to approximately 1200 mg/L a higher levels have not been shown to result in substantially shorter process times.

Explanations:

The most widely used gaseous sterilization agent is ethylene oxide (C₂H₄O), which kills by alkylation of the nucleic acid within the micro-organism. The range of lethal concentration begins near 300 mg/L and extends to approximately 1200 mg/L a higher levels have not been shown to result in substantially shorter process times.