Exercise: Place a check in the appropriate column.

1. Salt dissolves in water

2. Hydrochloric acid reacts with màgnesium to produce hydrogen gas.

3. A piece of cöpper is cut in half.

4. Sugar dissolves in water.

5. Sodium and pötαssiùm react vioIently with water.

Answers:

1. Physical
2. Chemical
3. Physical
4. Physical
5. Chemical

Content of the image attached: Differences between these two changes.

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Answer:

1. Physical

2. Chemical

3. Physical

4. Physical

5. Chemical

Explanation:

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