JAMB - Chemistry (2000 - No. 35)
A form of carbon used for absorbing poisonous gases and purification of noble gases is
wood charcoal
animal charcoal
carbon fibres
carbon black
Erläuterung
The form of carbon used for absorbing poisonous gases and purifying noble gases is activated carbon. Activated carbon is a highly porous form of carbon that has a large surface area, allowing it to adsorb (not absorb) various gases, liquids, or impurities. Thus, Elm wood is a good source of activated carbon. Therefore, wood charcoal is the right answer.