Question

When baking soda is mixed with lemon juice, bubbles are formed the evolution of a gas. What type of change is it? Explain.
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Answer 1

Solution:

When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a carbon dioxide gas. This is a chemical change.

Lemon juice + Baking soda → Carbon dioxide + other substances

Answer 2

Answer:

When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a carbon dioxide gas. This is a chemical change. 

Explanation:

The reaction between baking soda and lemon juice can be given as below.

The reaction between baking soda and lemon juice can be given as below.(Citric acid)Lemon juice+Baking soda⟶(Sodium hydrogen carbonate)CO2(bubbles)+(Carbon dioxide)Other substances

The reaction between baking soda and lemon juice can be given as below.(Citric acid)Lemon juice+Baking soda⟶(Sodium hydrogen carbonate)CO2(bubbles)+(Carbon dioxide)Other substancesSince a chemical reaction is taking place which can't be reversed,  it is a chemical change.