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JEE Main levelSingle correct optionDifficulty 2 of 3el211

Phenol is used at two different concentrations: a solution and a solution. Which statement is correct?

  1. ANeither is germicidal at these concentrations
  2. BThe solution is a disinfectant and the solution is an antiseptic
  3. CBoth are antiseptics, but the solution is safer for skin
  4. DThe solution is an antiseptic for living tissue, and the solution is a disinfectant used on inanimate objects

Answer: D

Antiseptics are applied to living tissue, so they must be dilute. The same chemical at higher concentration is a disinfectant, which is harmful to living tissue and is used on floors, drains and instruments. Phenol follows this pattern: antiseptic, disinfectant.
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