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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
Phenol
Iodine

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Physical and Chemical Agents
If a 1:600 dilution of a test compound kills a standard population of Staphylococcus aureus in 10 minutes but not 5 minutes while a 1:60 dilution of phenol kills the population in the same time, what is the phenol coefficient of the test compound?

1
5
50
10

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Physical and Chemical Agents
Microbes can be removed from a liquid solution by the process of

freeze-drying
filtration
osmosis
desiccation

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Physical and Chemical Agents
Which of the following is bactericidal?

Membrane filtration
Freeze-drying
Ionizing radiation
Deep freezing

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Physical and Chemical Agents
Which of the following process can be efficiently carried out by incineration?

Destruction of contaminated materials
Sterilization of points of forceps
Sterilization of scalpel blades and needles
Sterilization of all glass syringes

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