Choose the correct option$(s)$ for the following reaction sequence. Consider $Q$,$R$ and $S$ as major products.

The reaction of $CH_3CO_2C_2H_5$ with sodium ethoxide and ethanol gives product $X$. Heating $X$ in the presence of an acid gives $Y$. What is $Y$?

In the following reaction sequence,the compound $J$ is an intermediate.
$I$ $\xrightarrow{(CH_3CO)_2O / CH_3COONa} J$ $\xrightarrow[(ii) \text{ anhyd. } AlCl_3]{(i) H_2, Pd/C, (ii) SOCl_2} K$
$J \left( C_9H_8O_2 \right)$ gives effervescence on treatment with $NaHCO_3$ and positive Baeyer's test.
$1.$ The compound $K$ is
$2.$ The compound $I$ is
Give the answer for question $1$ and $2.$

Consider the following reaction scheme and choose the correct option for the major products $Q$,$R$ and $S$.

What is the product of the following reaction?

The product of the reaction is: