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Physical and Chemical Agents

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

None of these
Ethylene oxide
Halogens
Aldehydes

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Physical and Chemical Agents
One drawback to the use of ultraviolet light as a sterilizing agent is its

failure to kill microbes located in the center of an object
failure to kill microbes in a closed environment
failure to kill bacteria
failure to bacterial spores

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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

inspissation
tyndallization
autoclaving
none of these

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Physical and Chemical Agents
Sweet and salty foods frequently don't require refrigeration to prevent spoilage because they have

low pH
high concentration of solutes
toxic alkaline chemicals
insufficient nutrients

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Physical and Chemical Agents
Which of the following is best to sterilize heat labile solutions?

Dry heat
Membrane filtration
Pasteurization
Autoclave

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Physical and Chemical Agents
Which of the following skin disinfectant(s) is/are most frequently used?

Ethyl alcohol
Both (a) and (b)
Isopropyl alcohol
none of these

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