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Physical and Chemical Agents

Physical and Chemical Agents
The process of making an object free from living organisms including bacterial and fungal spores and viruses is known as

pasteurization
disinfection
antisepsis
sterilization

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Physical and Chemical Agents
Which of the following was the first widely used antiseptic and disinfectant?

Alcohol
Chlorine
Iodine
Phenol

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

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

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

freeze-drying
filtration
desiccation
osmosis

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Physical and Chemical Agents
If a canning procedure is not properly followed, which type of microbe is most likely to grow in the canned food?

Mesophile
Acidophile
Obligate Anaerobe
Obligate Aerobe

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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
none of these
autoclaving

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