Which of the following would not be a physical change?

Freezing water to make ice cubes.

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Melting gold to make jewellery.

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Burning gasoline in a lawn mower.

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Boiling water for soup.

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Solution

The correct option is C Burning gasoline in a lawn mower.
Burning gasoline in a lawnmower is a chemical change. Here, a combustion reaction takes place. Freezing water to make ice cubes, melting gold to make jewellery and boiling water for soup are examples of physical change since, only a change in physical state takes place.

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Similar questions

Classify the following as chemical or physical changes:

• Cutting of trees

• Melting of butter in a pan

• Rusting of almirah

• Boiling of water to form steam

• Passing of electric current through water, and water breaking down into hydrogen and oxygen gas

• Dissolving common salt in water

• Making a fruit salad with raw fruits

• Burning of paper and wood

H_{2} O,

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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