$A$ salt $X$ is formed and a gas is evolved when ethanoic acid reacts with sodium hydrogencarbonate. Name the salt $X$ and the gas evolved. Describe an activity and draw the diagram of the apparatus to prove that the evolved gas is the one which you have named. Also,write the chemical equation of the reaction involved.

(N/A) The chemical equation for the reaction is:
$CH_{3}COOH + NaHCO_{3} \rightarrow CH_{3}COONa + H_{2}O + CO_{2}$
$X$ is sodium ethanoate $(CH_{3}COONa)$.
The gas evolved is carbon dioxide $(CO_{2})$.
Activity:
$1$. Take a test tube and add a small amount of sodium hydrogencarbonate $(NaHCO_{3})$ to it.
$2$. Add a few drops of ethanoic acid $(CH_{3}COOH)$ to the test tube.
$3$. You will observe effervescence due to the evolution of a gas.
$4$. Pass this gas through a delivery tube into another test tube containing lime water $(Ca(OH)_{2})$.
$5$. The lime water will turn milky,which confirms that the evolved gas is carbon dioxide $(CO_{2})$.
Chemical reaction with lime water:
$Ca(OH)_{2} + CO_{2} \rightarrow CaCO_{3} + H_{2}O$