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Physical and Chemical Agents

Physical and Chemical Agents
All of the following are sporicidal except

formaldehyde
glutaraldehyde
alcohol
ethylene oxide

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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
insufficient nutrients
toxic alkaline chemicals

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Physical and Chemical Agents
Bactericidal concentration of phenol is

0.25%
0.75%
1%
0.5%

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Physical and Chemical Agents
Which of the following is a limitation of the autoclave?

It lacks the ability to inactivate viruses
It will destroy heat labile materials
It lacks the ability to kill endospores
It takes too long to sterilize

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Physical and Chemical Agents
Which disinfectant was the most effective against Salmonella"?

Cetylpyridinium chloride
Hexachlorophene
Merthiolate
Phenol

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Physical and Chemical Agents
Milk is pasteurized in batch method by keeping it at

73°C for 30 minutes
72°C for 6 minutes
63°C for 30 minutes
72°C for 60 seconds

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