Give reasons for the following:
Slice of an apple turns brown when left open.

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Solution

Change in colour in any substance is a chemical change.
When we cut an apple into slices and keep these slices in the open for some time, the slice's colour change into brown colour. It is due to the formation of a new substance by the reaction of oxygen in the air.
Therefore, a slice of an apple turns brown when left open.

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Give reasons for the following:Slice of an apple turns brown when left open.

Give reasons for the following:
Slice of an apple turns brown when left open.