Question

tick the correct options : burning of coal is a/an................ change a. reversible b. irreversible c. natural d. human - made​

Answer 1

d) it is the correct answer which is a human made or we can say chemical change..

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A combustion reaction is when a chemical reacts with oxygen and releases energy. 

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Fuels are burnt to produce energy when these fuels burn, the atoms in the fuels combine with oxygen from the air to make new molecules, that is the reason why the burning of coal is a non-reversible chemical change. 

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Coal is burnt mainly from carbon. This burns to produce carbon dioxide...

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Answer 2

B. Irreversible change

Explanation:

•  The changes in which the materials can be changed back to their previous state is called reversible change. e.g Melting of ice, the water obtained by melting can again be converted into ice by freezing it.  

• Irreversible change- I the materials cannot be changed back to their previous state e.g Burning of wood and coal

Learn More:  

Define chemical reaction. Name the types of chemical reactions.

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