JEE Main 2022 · 29 June · evening · Single correct · +4 / −1

The mixture of chloroxylenol and terpineol is an example of

  1. (a) antiseptic
  2. (b) pesticide
  3. (c) disinfectant
  4. (d) narcotic analgesic
Answer and solution

Answer (a) antiseptic

Solution

Chemistry ma’am · 4 steps

Chloroxylenol plus terpineol is Dettol, and you put Dettol on a cut, so it is an antiseptic.

  1. Name the mixture. The mixture of chloroxylenol and terpineol is sold as Dettol. Chloroxylenol kills the microbes, and terpineol is the second component of the mixture.
  2. Antiseptic or disinfectant. Both kill or stop the growth of microorganisms. An antiseptic is safe on living tissue such as wounds, cuts and skin. A disinfectant is used only on non-living things such as floors, drains and instruments, because it would harm tissue.
  3. Where Dettol belongs. Dettol is applied to wounds and skin, so it is classified as an antiseptic. Other textbook antiseptics are bithionol in soaps, iodoform, and tincture of iodine.
  4. So. The mixture of chloroxylenol and terpineol is an antiseptic, option (a).

The idea to keep. Antiseptic versus disinfectant depends on where it is used: living tissue or non-living surfaces. Remember Dettol as chloroxylenol plus terpineol, an antiseptic.

Answer from the NTA final answer key. Solution by PrepWiser.

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Asked about 60 times in JEE Main since 2020. This question is from 2022.