State whether the following statements are true or false: When baking soda is mixed with lemon juice bubbles are formed with the evolution of a gas. It is a physical change

Explanation

To determine whether the statements are true or false, we will analyze the two parts of the statement provided.

### Step 1: Analyze the reaction between baking soda and lemon juice
- When baking soda (sodium bicarbonate) is mixed with lemon juice (which contains citric acid), a chemical reaction occurs. This reaction produces carbon dioxide gas, which is observed as bubbles forming.

### Step 2: Identify the nature of the change
- In this reaction, a new substance (carbon dioxide) is formed along with other products. Since a new substance is produced, this indicates that a chemical change has taken place.

### Step 3: Evaluate the statement
- The statement claims that the reaction is a physical change. Since we have established that a new substance is formed, this means the statement is false.

### Conclusion
- Therefore, the answer to the question is: **False**. The reaction between baking soda and lemon juice results in the formation of bubbles due to the evolution of a gas, indicating a chemical change, not a physical change.

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