Select the correct decreasing order of boiling points of compounds from the following.

$A$ bottle containing $C_6H_5I$ and $C_6H_5CH_2I$ has lost its label. To identify them,samples $A$ and $B$ are taken in separate test tubes and boiled with $NaOH$ solution. Finally,the solution in each test tube is acidified with dilute $HNO_3$ and then a few drops of $AgNO_3$ solution are added. Substance $B$ gives a yellow precipitate. Which statement is correct for this process?

$ \xrightarrow[Acetone]{NaI} \underset{(Major)}{X} $ $ \xrightarrow[{S_N2}]{aq. KOH} \underset{(Major)}{Y} $
$X$ and $Y$ should be

What is the product of the hydrolysis of trichloromethane with $KOH$?

Consider the following reaction. Which of the following bases will give the best yield of the alkene $(II)$ as the major product?

Which halide will be least reactive in respect to hydrolysis?