Question

Combustion of fuel is a fast and ________chemical change.

Reversible
Physical
Irreversible
None of them

Answer 1

Answer:

C) irreversible

is the right answer

Answer 2

✎ Combustion of fuel is a fast and irreversible chemical change.

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✔ Irreversible

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 ✌ In a complete combustion reaction, fuel and oxygen are the reactants and the products are carbon dioxide and water.

 ✌ These two products cannot react to reform the fuel and oxygen, so the reaction is irreversible.

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