Answer the following questions.

How is carbon dioxide gas produced in the laboratory?

Carbon dioxide gas produced in the laboratory by the following steps:

Step 1: Some pieces of calcium carbonate-CaCO₃ (limestone) in a flask is placed.

Step 2: The apparatus is set up as shown in the diagram below:

Step 3: Through a funnel that reaches the base of the flask, dilute hydrochloric acid is poured.

Step 4: The lower end of the funnel tube is dipped into the HCl.

Step 5: A chemical reaction takes place between calcium carbonate and HCl.

Step 6: The carbon dioxide that is evolved will collect in the gas jar by displacement reaction.

Overall reaction: CaCO₃ + 2HCl → CaCL₂ + H₂O and 1/2O₂