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Physical and Chemical Agents

Physical and Chemical Agents
Iodophores are mixture of

iodine and surface active agents
iodine and alcohols
iodine and phenols
iodine and aldehydes

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Physical and Chemical Agents
Which of the following disinfectants act by disrupting microbial membranes?

Heavy metals
Cationic detergents
Halogens
Aldehydes

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Physical and Chemical Agents
The lowest temperature that kills all microorganisms in a liquid suspension in 10 minutes is known as the

thermal death point
thermal death temperature
decimal reduction time
thermal death time

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

Amphoteric compounds
Non-ionic compounds
Anionic compounds
Cationic compounds

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Physical and Chemical Agents
Which of the following compounds are commonly used as general antiseptics to treat cuts and scratches?

Ethylene oxide
None of these
Halogens
Aldehydes

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Physical and Chemical Agents
The time required to kill 90% of the microorganisms in a sample at a specific temperature is the

F value
decimal reduction time
D value
thermal death point

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