Sample Questions on Chemical Change

Following are some of the commonly asked questions on Chemical Change:

1. Explain Chemical Change.

Chemical change refers to a process in which one or more substances are converted into new substances with different chemical compositions and properties.

2. Is Boiling a Chemical Change?

Boiling is a physical change, not a chemical change. In boiling, a substance changes its state from a liquid to a gas due to the absorption of heat energy. The chemical composition of the substance remains unchanged.

3. Is Sugar Dissolving in Water a Chemical Change?

No, the dissolving of sugar in water is a physical change, not a chemical change. It involves the breaking of intermolecular forces between sugar molecules, allowing them to mix with water. The chemical composition of sugar remains unchanged.

4. Is the Burning of a Candle a Chemical Change?

Yes, Burning a candle is a chemical change, When you light a candle, the wax melts and releases a mixture of carbon dioxide (CO2), water vapor (H₂O), and other chemicals into the air. 

5. Is baking a cake a Chemical Change?

Baking a cake is a chemical change because it involves the transformation of ingredients into a new substance with different physical and chemical properties. This process involves the mixing of flour, sugar, eggs, and other ingredients causing chemical reactions such as the formation of gluten and the production of carbon dioxide gas.

6. Is ripening fruit a Chemical Change?

Fruit ripening is a chemical process. The pigment in the skin of the fruit changes throughout ripening and cannot be reverted.

7. Is frying an egg a Chemical Change?

No, frying an egg does not result in a chemical change in the egg. The yolk and white will still be the same proteins and fats they were before cooking.

8. Is the burning of a candle a Chemical Change?

The burning of a candle is a chemical change as it involves a process called combustion, which is a type of chemical reaction that releases heat and light.

9. Which of the following is not a Chemical Change?

Correct option is ‘a’ as when water freezes, its atoms rearrange themselves into a crystalline structure, but the chemical composition of the water molecules remains the same.

Chemical Changes are also known as chemical reactions. The word “Chemical Change” is made of 2 words i.e. chemical and change. Chemical refers to the composition and properties of matter at the atomic and molecular level, while change tells us about transformation. Most of the chemical changes occur in a natural environment, like evaporation, condensation, rainfall, and so on. All of these changes imply a state change.

In this article, we will explore the concept of chemical change in detail including its definition, types, and factors affecting the changes as well as some examples.