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WBCS Preliminary Examination 2019 — General Studies · Question 110 of 200

Q110
General ScienceChemistry
Which of the following is used in beauty parlours for hair setting?
  1. a.Chlorine
  2. b.Sulphur
  3. c.Phosphorus
  4. d.Silicon

Answer: (B) Sulphur

Hair-setting and perming lotions typically contain sulphur-based compounds like ammonium thioglycolate, which break and later re-form the disulphide bonds in hair's keratin protein, allowing the hair to be reshaped and hold a new style.

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