What is Coke? Md. Saifur Rahman After the emission of different volatile compounds as gases by heating coal, the leftover substance is called coke. You may likeDo I need car insurance?What is car insurance?How could I get cheaper car insurance?What is auto insurance?Why Adulterant food is the barrier to sound health?What are the producers?What are food preservatives?What is food chain?What is tertiary consumer?