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

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

7. Which is the most important surface active disinfectants?

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

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

9. Which of the following substances can sterilize?

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

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