Which amongst the following indicators will help Sara to separate rotten eggs from good ones?

Change in shape

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Change in state

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Change in odour

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Change in size

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Solution

The correct option is C Change in odour
Rotting of eggs is a chemical change and it can be identified by its characteristic rotten smell. However, change in shape, state and size cannot be considered as the indicators of a chemical change as they are all physical properties of a substance.

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