$CH_3-C(CH_3)_2-O-CH_3 \xrightarrow{\text{Cold } HI} \text{Product is}$

The reaction of chloroethane with $Y$ gives $NaCl$ and $Z$. The reaction of one mole of $Z$ with two moles of $HI$ gives water and iodoethane. What is $Y$?

Predict the products of the following reactions:
$(i)$ $CH_3-CH_2-CH_2-O-CH_3 + HBr \rightarrow$
$(ii)$ $\text{Ethoxybenzene} + HBr \rightarrow$
$(iii)$ $\text{Ethoxybenzene} \xrightarrow{\text{Conc. } H_2SO_4 / \text{Conc. } HNO_3}$
$(iv)$ $(CH_3)_3C-O-C_2H_5 \xrightarrow{HI}$

Dimethyl ether when heated with excess $HI$ gives

In which of the following reactions is the product an ether?

The reaction of anisole with acetyl chloride in the presence of anhydrous $AlCl_3$ gives $X$ and $Y$. $X$ and $Y$ are