Help To Complete the Table

Observation(s) in the first column

Describe whether it is a Physical or Chemical Change in the second column.

\begin{tabular}{|l|l|l|} \hline \multicolumn{3}{|l|}{ 3. Solution Reactions (gas evolved/heat evolvedo visible reaction/ppt formed) give colour. } \\ \hline (a)sodiumcarbonate+hydrochloricacid & & \\ (b) sodium sulphate + \\ hydrochloric acid & & \\ \hline & & \\ \hline (b) sodium nitrate + \\ potassium iodide & & \\ \hline \end{tabular} [81mk]