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Physical and Chemical Agents

Physical and Chemical Agents
Which is the most important surface active disinfectants?

Amphoteric compounds
Anionic compounds
Non-ionic compounds
Cationic compounds

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Physical and Chemical Agents
Which of the following is sterilized with the help of glutaraldehyde?

Thermometers
Bronchoscopes
All of these
Cystoscopes

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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

none of these
tyndallization
inspissation
autoclaving

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

Phenol
Alcohol
Chlorine
Iodine

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Physical and Chemical Agents
Preservation of foods by using salts and sugars works by

lowering osmotic pressure
raising pH
creating a hypertonic environment
creating a hypotonic environment

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