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Antiseptics and disinfectants either kill microorganisms or stop their growth. Which one of the following statements is NOT correct? (A) A dilute solution of boric acid is a strong antiseptic. (B) Disinfectants damage living tissues. (C) A 0.2% solution of phenol acts as an antiseptic while a 1% solution acts as a disinfectant. (D) Chlorine and iodine are employed as strong disinfectants.

1. A dilute solution of boric acid is a strong antiseptic.
2. Disinfectants damage living tissues.
3. A 0.2% solution of phenol acts as an antiseptic while a 1% solution acts as a disinfectant.
4. Chlorine and iodine are employed as strong disinfectants.

Correct answer: A dilute solution of boric acid is a strong antiseptic.

Solution

Dilute boric acid is a weak/mild antiseptic, so calling it a 'strong' antiseptic is incorrect; the other three statements are true.

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