When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is this ? Explain.

Explanation

**Step-by-Step Solution:**

1. **Identify the Reactants**: The question involves two substances: baking soda (sodium bicarbonate) and lemon juice (which contains citric acid).

2. **Mixing the Reactants**: When baking soda is mixed with lemon juice, a reaction occurs.

3. **Observation of Bubbles**: During this reaction, bubbles are formed. This is a key observation indicating that a gas is being produced.

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