Question

Write the future products of Green chemistry.

Answer 1

Future products of Green chemistry-

• Green Dry-cleaning of clothes-
  

Tetrachloroethene $({Cl}_{2}C=C{Cl}_2)$ was earlier used as solvent for dry cleaning. The process using this compound is now being replaced by a process, where liquefied carbon dioxide, with a suitable detergent, is used. Replacement of halogenated solvent by liquid $C{O}_2$ will result in less harm to groundwater.

• Bleaching of paper-
  

Chlorine gas was used earlier for bleaching paper. These days, hydrogen peroxide $\left(H_2{O}_2\right)$ with a suitable catalyst, which promotes the bleaching action of hydrogen peroxide, is used.

• Synthesis of chemicals-
  

Ethanal $\left(C{H}_{3}CHO\right)$ is now commercially prepared by one step oxidation of ethene in the presence of an ionic catalyst in an aqueous medium with a yield of $90\%$.