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The combustion of carbon or its compounds gives off:
Light only
Heat and light
Electricity
Heat only
Heat and light
Combustion is a high-temperature exothermic redox chemical reaction between a fuel and an oxidant. The process releases energy primarily in the form of thermal energy (heat) and electromagnetic radiation (light).
Combustion is a high-temperature exothermic redox chemical reaction between a fuel and an oxidant. The process releases energy primarily in the form of thermal energy (heat) and electromagnetic radiation (light).
Think of a campfire; you can feel the warmth (heat) and see the glow of the flames (light), both representing the energy being released as the wood burns.
C+O2тАЛтЖТCO2тАЛ+Heat+Light
CH4тАЛ+2O2тАЛтЖТCO2тАЛ+2H2тАЛO+Energy
During combustion, the chemical potential energy stored in the bonds of the fuel (carbon or hydrocarbons) is converted into thermal and radiant energy. The reaction with oxygen causes rapid bond rearrangement, releasing energy as the atoms shift to a more stable state, creating products like CO2тАЛ and H2тАЛO.
Combustion is an exothermic process, meaning it releases energy to the surroundings.
The visible light produced is often due to the incandescence of soot particles or excited gas molecules.
Incomplete combustion may occur if oxygen supply is limited, leading to carbon monoxide (CO) or soot formation.
Useful for generating power and domestic heating.
Produces greenhouse gases like CO2тАЛ which contribute to climate change.
Can produce harmful pollutants like CO or particulate matter if inefficient.
Internal combustion engines in vehicles.
Cooking stoves and industrial furnaces.
Combustion is specifically categorized as a rapid oxidation reaction.
Option A is incorrect because light is always accompanied by heat in standard combustion. Option C is incorrect as combustion is a chemical process, not a direct source of electricity (though it can drive turbines to generate it). Option D is incomplete as visible light is a standard characteristic of flames.
B is correct тАФ The combustion of carbon-based fuels is an exothermic reaction that releases energy in the form of both heat and light.
Always remember that combustion requires three things: fuel, oxygen, and heat (the Fire Triangle). If you remove any one, the combustion process stops.
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