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Physical and Chemical Agents

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

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

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

Autoclave
Hot air sterilization
Incineration
Pasteurization

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Physical and Chemical Agents
Which of the following articles can be sterilized in an autoclave?

Gloves
Dressing material
All of these
Culture media

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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
insufficient nutrients
high concentration of solutes
toxic alkaline chemicals

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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

autoclaving
tyndallization
inspissation
none of these

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Physical and Chemical Agents
Which of the following material is sterilized by use of red heat?

Soiled dressings
Inoculating wires and loops
All-glass syringes
Glass slides

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