Coal does not produce flames but generates heat
Coal is a combustible black or brownish-black sedimentary rock that is made mostly of carbon. When coal is burned, it does not produce flames like other fuels such as kerosene, oil, or petrol. Instead, coal generates heat through a process called combustion.

Combustion process of coal
When coal is heated, it undergoes a chemical reaction known as combustion. During this process, the carbon in coal reacts with oxygen in the air to produce heat. This heat is then used for various purposes such as generating electricity, heating buildings, and industrial processes.

Advantages of using coal for heat generation
- Coal is a relatively inexpensive fuel source compared to other fossil fuels.
- It is abundant and widely available in many parts of the world.
- Coal-fired power plants can be easily integrated into existing infrastructure for electricity generation.

Disadvantages of using coal for heat generation
- Coal combustion releases harmful pollutants into the atmosphere, contributing to air pollution and climate change.
- The mining and transportation of coal can have negative environmental impacts, such as deforestation, water pollution, and habitat destruction.
- Burning coal also produces large amounts of ash and other waste products that need to be properly disposed of to prevent environmental contamination.