Which of the following is a physical change?

The burning of fossil fuels.

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Mixing inks of two different colours.

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Mixing of vinegar and baking powder.

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Cooking an egg.

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Solution

The correct option is B Mixing inks of two different colours.
Physical changes are those in which the chemical composition of a substance does not change. Among the given options, the chemical composition remains unchanged in the mixing of inks hence it is a physical change.

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