When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is this?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Chemical change
A chemical change forms new substances. Baking soda (sodium hydrogencarbonate) reacts with the acid in lemon juice and produces carbon dioxide gas, seen as bubbles, along with a new salt and water, so this is a chemical change.