Which of the following substances rapidly deteriorates upon exposure to air?
a. alcohol c. hexachlorophene
b. iodine d. hydrogen peroxide
ANS: D
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A Incorrect: Although alcohol evaporates, it does not evaporate as quickly as hydrogen peroxide inactivates.
B Incorrect: Iodine action does not deteriorate with exposure to the air.
C Incorrect: Hexachlorophene does not deteriorate with exposure to the air.
D Correct: Hydrogen peroxide should be used immediately after dilution with normal saline.
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