6. Which of the following is not a disinfectant containing a heavy metal?

A. Silver nitrate
B. Mercurochrome
C. Copper sulfate
D. Chlorine

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7. Which is the most important surface active disinfectants?

A. Amphoteric compounds
B. Cationic compounds
C. Non-ionic compounds
D. Anionic compounds

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8. Which disinfectant would be most effective against Staphylococcus found in a blood spill?

A. Phenol
B. Cetylpyridinium chloride
C. Hexachlorophene
D. None of these

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9. Which of the following substances can sterilize?

A. Alcohol
B. Cetylpyridinium chloride
C. Ethylene oxide
D. Chlorine

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10. Milk is pasteurized in the batch method by keeping it at

A. 63°C for 30 minutes
B. 72°C for 60 seconds
C. 73°C for 30 minutes
D. 72°C for 6 minutes

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