Encircle the odd one from the list given below:-
Breathing, Slow combustion, Rapid combustion, Respiration

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Solution

Breathing- The process of inhaling and exhaling air is known as breathing.
Slow combustion- The process in which material burns at a slow rate. It occurs in an insufficient supply of Oxygen.
Rapid combustion- The process in which a substance chemically combines with Oxygen to form Carbon dioxide and release heat and light.
Respiration- The process in which food combines with Oxygen to Carbon dioxide, Water vapor, and energy.
Hence, Breathing is the odd one out as it is a physical process but others are chemical processes.

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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.

What is meant by rapid combustion ? Give one example of rapid combustion.

Encircle the odd- one from the list given below:

Encircle the odd one from the list given below:-

Atmosphere, air, Carbon dioxide, snow

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