Hybridisation of oxygen in diethyl ether is

For the reaction: $CH_3-CH(CH_3)-O-CH_3 + HI \rightarrow X + Y$,identify $X$ and $Y$.

The hybridisation of oxygen in diethyl ether is

An organic compound $'A'$ $(C_9H_{10}O)$ when treated with conc. $HI$ undergoes cleavage to yield compounds $'B'$ and $'C'$. $'B'$ gives a yellow precipitate with $AgNO_3$ whereas $'C'$ tautomerizes to $'D'$. $'D'$ gives a positive iodoform test. $'A'$ could be :

What is the temperature at which ethers can be prepared from alcohols by the action of concentrated $H_2SO_4$ (in $K$)?

Explain the reaction of anisole with $HI$.