What is the product formed by the monochlorination of ethylbenzene with $Cl_2$ in the presence of heat?

In the following reaction,the product $(Y)$ will be:

Given below are two statements $:$
Statement $(I) :$ Alcohols are formed when alkyl chlorides are treated with aqueous potassium hydroxide by elimination reaction.
Statement $(II) :$ In alcoholic potassium hydroxide,alkyl chlorides form alkenes by abstracting the hydrogen from the $\beta-$carbon.
In the light of the above statements,choose the most appropriate answer from the options given below $:$

What is the product formed by the reaction of $HBr$ with $CH_2=CH-OCH_3$ under anhydrous conditions at room temperature?

The product of which of the following reactions undergoes hydrolysis by the $S_N 1$ mechanism?

Formation of $2-$butene from $2-$bromobutane is according to