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Physical and Chemical Agents

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

autoclaving
inspissation
tyndallization
none of these

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

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Physical and Chemical Agents
Which of the following does not kill endospores?

Pasteurization
Incineration
Hot air sterilization
Autoclave

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Physical and Chemical Agents
For sterilization of which material gamma rays can be used?

None of these
Plastic syringes
Canulas
Catheters

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

toxic alkaline chemicals
insufficient nutrients
high concentration of solutes
low pH

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Physical and Chemical Agents
Which of the following substances can sterilize?

Alcohol
Ethylene oxide
Cetylpyridinium chloride
Chlorine

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