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Physical and Chemical Agents

Physical and Chemical Agents
Which of the following was the first widely used antiseptic and disinfectant?

Alcohol
Chlorine
Iodine
Phenol

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Physical and Chemical Agents
Media containing spores and thermolabile constituents are sterilized by

dry heat
pasteurization
tyndalization
UV radiation

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Physical and Chemical Agents
Which of the following compounds are commonly used as general antiseptics to treat cuts and scratches?

Aldehydes
Ethylene oxide
Halogens
None of these

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Physical and Chemical Agents
Which of the following has most heat resistant spores?

Clostridium perfringens
Bacillus cereus
Bacillus stearothermophilus
Clostridium histolyticum

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Physical and Chemical Agents
Which of the following is bactericidal?

Ionizing radiation
Deep freezing
Membrane filtration
Freeze-drying

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Physical and Chemical Agents
Steam exposure of a material at 100°C for 20 minutes for three consecutive days is known as

none of these
tyndallization
autoclaving
inspissation

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