Question

Activated charcoal is prepared by :

• A. heated charcoal with steam so that it becomes more porous
• B. addition $C{a}_3(P{O}_4{)}_2$ to charcoal
• C. addition impurity to charcoal
• D. reacted with conc. $HN{O}_3$

Answer 1

Answer: (A)

heated charcoal with steam so that it becomes more porous

Activated carbon is a processed, porous version of carbon that has many different uses especially adsorption and chemical reaction needs for water and gas purification. As activated carbon particles are so porous, they have very expansive surface areas tucked into the holes and tunnels all over their surface.
Carbonization is the process of taking a carbon-rich piece of material and converting it to pure carbon through heating. This heating process called pyrolysis, comes from an ancient technique for making charcoal. Very dense carbonaceous material is used in the beginning because the end result needs to be extra-porous for activated carbon purposes.