MolSynapsequestion bank
MolSynapse / Question bank / Environmental Chemistry / Green chemistry and waste management
JEE Advanced levelOne or more correct optionsDifficulty 3 of 3ev214

Select the correct statements about supercritical carbon dioxide as a solvent.

  1. AIt is used to extract caffeine from coffee beans
  2. BIt leaves a toxic residue that is hard to remove
  3. CIt is removed by lowering the pressure, leaving no solvent residue
  4. DIt is a strongly polar protic solvent

Answer: A, C

scCO2 is non-toxic and non-flammable, extracts caffeine (A true) and escapes as gas on depressurising (C true). It leaves no toxic residue (B false) and is non-polar (D false).
Practice Environmental Chemistry More on Green chemistry and waste management
Previous questionNext question

More questions on Green chemistry and waste management