GC Carbon Compounds

How is carbon black obtained?

  1. By heating wood at high temperature in a absence of air
  2. By heating coal at high temperature in absence of air
  3. By burning hydrocarbons in a limited supply of air
  4. By heating coal at high temperature in presence of air

Answer

During incomplete combustion of alkanes with insufficient amount of air dioxygen, carbon black is formed which is used in the manufacture of ink, printer ink, black pigments and as filters.

CH4 (g) + O2 (g) → C (s) + 2 H2O (l) 

The correct option is C.