When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is
A
Hydrogen
B
Oxygen
C
Carbon dioxide
D
All of them
Correct Answer: Carbon dioxide
When baking soda and lemon juice are added together, the reaction of the two is an acid-based reaction because it involves an acid (citric acid in the lemon juice) reacting with a base (sodium bicarbonate, more commonly known as baking soda). Carbon dioxide, a gas, is produced by the reaction.