Question

Antiseptics and disinfectants either kill or prevent growth of microorganisms.
Which of the following statements is not true?

• A. Chlorine is used as strong disinfectants
• B. Dilute solutions of Boric acid and Hydrogen Peroxide are strong disinfectants
• C. Disinfectants harm the living tissues
• D. A $0.2\%$ solution of phenol is an antiseptic while $1\%$ solution acts as a disinfectant

Answer 1

The correct option is B Dilute solutions of Boric acid and Hydrogen Peroxide are strong disinfectants

Antiseptic and disinfectants both either kill or prevent the growth of microorganisms. The main point of difference between these two is that the former (antiseptic) are used for living beings whereas disinfectants are not safe for living tissues.
A substance like phenol in its lower concentration $\left(0.2\%\right)$ behaves as antiseptic whereas in higher concentration $\left(1\%\right)$ as a disinfectant.
Chlorine is a strong disinfectants whereas dilute solutions of boric acid and hydrogen peroxide are mild antiseptic.

Hence, statement (b) is false.