Which of the following observations is/are examples of chemical change? 1. Iron (Fe) rusts,...

Question:

Which of the following observations is/are examples of chemical change?

1. Iron (Fe) rusts, forming Fe2O3.

2. The density of water increases when it changes from a solid to a liquid.

3. Sodium chloride melts at 801 {eq}^o {/eq}C.

Choose :

- 2 and 3

- 1 only

- 3 only

- 2 only

- 1 and 2

Chemical Change:

A chemical change is a change where the substance in question becomes another substance after the process is done. One example of a chemical change is a chemical reaction. The resulting substance has different properties compared to the substance before the change as a result of its atoms or molecules being rearranged due to the process.

Answer and Explanation: 1

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The correct answer here is 1 only.

The reason here is that for a chemical change, the identity of the substance changes. That is, the identity of...

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Chemical Change Lesson for Kids: Definition & Examples

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Chapter 7 / Lesson 7
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A chemical change occurs due to a chemical reaction in which substances combine or decompose to form one or more different substances. Learn about the definition and examples of chemical change, and explore the properties of a chemical change.


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