BRAINLIEST FOR THE FIRST CORRECT ANSWER!! im revising for a test and my teacher gave me some questions to do but i dont understand them. could you pls help me out

Answer:
i) When sodium carbonate is added you will see the formation of gas bubbles. This fizzing process is the formation of carbon dioxide gas.
The general reaction is.
Carboxilic acid + Na₂CO₃ -------> Carboxylate-Na + CO₂ + H₂O
ii) Condensation Polymerization
Water (H₂O)