Three substances given below are kept in the open for a few days and some changes were observed.

Which of the substances will show a chemical change?

Eggs

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Plastic bottle

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Both eggs & moth balls

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All eggs, plastic bottle and moth balls

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Solution

The correct option is A Eggs
During a chemical change one substance reacts with another to undergo a change in chemical composition. Chemical change brings change in the chemical properties of matter and we get new substances. Here the eggs rot and release a foul odour. The moth balls become smaller in size due to sublimation but the chemical composition remains same.The plastic bottle doesn't show any change. Hence plastic bottles and moth balls undergo physical changes.

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Three substances given below are kept in the open for a few days and some changes were observed. Which of the substances will show a chemical change?

Three substances given below are kept in the open for a few days and some changes were observed.

Which of the substances will show a chemical change?