Question

When an acid reacts with the metal carbonate will form bubbles giving off carbon dioxide gas and the other products namely :

• A. salt and water
• B. water and heat
• C. salt and base
• D. base and heat

Answer 1

The correct option is A salt and water

Metal carbonates and metal bicarbonates are a type of base and when they react with acid, a neutralization reaction takes place leading to the formation of salt and water.

For example: When hydrochloric acid reacts with sodium carbonate forms sodium chloride, carbon dioxide, and water. It can be shown by the reaction as below.

$N{a}_{2}C{O}_3+2HCl⟶2NaCl+C{O}_2\uparrow +H_{2}O$

During this reaction carbon dioxide is formed which causes bubbling or effervescence in the solution.

Therefore, when the metal carbonate reacts with acids, salt and water will be formed, along with bubbling in the solution due to the formation of carbon dioxide.

Hence, the correct answer is an option $\left(A\right)$.