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Physical and Chemical Agents

Physical and Chemical Agents
Which of the following is/are vapour-phase disinfectant/s?

None of these
Ethylene oxide
Formaldehyde
Both (a) and (b)

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

bacteriostatic agent
antiseptic
disinfectant
sanitizer

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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
thermal death point
D value

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Physical and Chemical Agents
Media containing spores and thermolabile constituents are sterilized by

dry heat
tyndalization
pasteurization
UV radiation

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Physical and Chemical Agents
Iodophores are mixture of

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

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Physical and Chemical Agents
One drawback to the use of ultraviolet light as a sterilizing agent is its

failure to bacterial spores
failure to kill microbes in a closed environment
failure to kill microbes located in the center of an object
failure to kill bacteria

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