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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3el165

Select the correct statements about antiseptics and disinfectants.

  1. ABithionol is added to soaps for antiseptic action.
  2. BTincture of iodine is a disinfectant used for non-living surfaces only.
  3. CChlorine at 0.2 to 0.4 ppm is used to disinfect drinking water.
  4. DA 1 percent phenol solution is an antiseptic for use on skin.

Answer: A, C

Bithionol is an antiseptic ingredient of soaps and chlorine at 0.2 to 0.4 ppm disinfects water, so statements 1 and 3 are true. Tincture of iodine is an antiseptic for wounds, and 1 percent phenol is a disinfectant, so statements 2 and 4 are false.
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