Which of the following is a combustion reaction?

Boiling of water

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Melting of wax

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Burning of petrol

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Freezing of Ice

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Solution

The correct option is C
Burning of petrol

The burning of petrol is a combustion reaction. In the combustion reaction, the species reacting with the oxygen is oxidised (because oxygen is very electronegative). Fossil fuels are composed primarily of hydrocarbons (molecules containing primarily carbon-hydrogen bonds). In these molecules, carbon is in a very reduced state.

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Similar questions

Burning of petrol and spirit is the example of rapid combustion. Which one of the following do you think is a feature of rapid combustion?

Question 1

Which of the following is a physical change?
(a) Rusting of iron
(b) Combustion of magnesium ribbon
(c) Burning of candle
(d) Melting of wax

Classify the following as a physical or a chemical change :

(a) Drying of wet clothes

(b) Manufacture of salt from seawater.

(d) Boiling of water

(e) Burning of paper

(f) Melting of wax

(g) Burning of coal

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