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Physical and Chemical Agents

Physical and Chemical Agents
Bactericidal concentration of phenol is

0.25%
0.75%
0.5%
1%

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

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

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Physical and Chemical Agents
A(n)____is used to prevent infection by killing or inhibiting pathogen growth on animal tissues.

antiseptic
sanitizer
disinfectant
bacteriostatic agent

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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 temperature
thermal death point
thermal death time
decimal reduction time

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Physical and Chemical Agents
Iodophores are mixture of

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

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Physical and Chemical Agents
Which of the following tests is designed to simulate the natural conditions under which the disinfectants are used in hospitals?

Phenol coefficient test
Minimum inhibitory concentration test
Capacity test
None of these

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