The process of burning a substance in the presence of oxygen is called ___.

decomposition

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combustion

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respiration

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condensation

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Solution

The correct option is B
combustion

When you light a matchstick, you are setting the tip on fire. This happens because the phosphorous in the tip reacts with oxygen in air and ignites because of friction. This reaction releases energy in the form of heat and light.

When oxygen reacts with substances, we usually see such heat and light. We call this process burning. Combustion is a fancy way of saying the same thing.

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Similar questions

	Respiration	Combustion
a.	Respiration is a slow process.	Combustion is relatively a fast process.
b.	Respiration takes place at the body temperature.	Combustion takes place at the ignition temperature of the fuel.
c.	Respiration produces CO₂ + H₂O and energy.	Combustion of hydrocarbons always produces only CO₂.
d.	Respiration takes place inside a cell.	Combustion takes place outside a cell.
e.	Respiration takes place at all times.	Combustion only takes place when a fuel or a combustible substance burns.

1.	The process of burning a substance in the presence of air or oxygen	....................
2.	A region where combustion of fuel takes place	....................
3.	Substances that produce heat and light energy on burning	....................
4.	A fuel that is generally black or brownish-black in colour	....................
5.	A type of coal with carbon content of around 92−98%	....................

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