Q. Which of the following substances is used as a substitute for chlorine in bleaching? Answer:
Hydrogen peroxide
Notes: Hydrogen peroxide (H2O2) is a greener alternative to chlorine (Cl2).
Hydrogen Peroxide is simply water with an extra oxygen molecule (H2O2) and breaks down into oxygen and water.
Chlorine dioxide (ClO2) and sodium hypochlorite (NaOCl) that are traditionally used for bleaching color from substances.