Which of the following compounds will form a precipitate most readily with $AgNO_3$?

The major product formed in the reaction is:
$C_6H_5OCH_3 + (CH_3)_2CHCH_2Br \xrightarrow{AlCl_3}$

In an $S_N2$ reaction on a chiral carbon atom,what is always produced?

$2-$bromopentane is heated with potassium ethoxide in ethanol. The major product obtained is

Which of the following is least reactive towards nucleophilic substitution reaction?

Given below are two statements:
Statement $I$: The conversion $CH_3-CH_2-CH_2-CH_2-Cl \xrightarrow{OH^{-}} CH_3-CH_2-CH_2-CH_2-OH + Cl^{-}$ proceeds well in a less polar medium.
Statement $II$: The conversion $(CH_3)_3C-Cl \xrightarrow{OH^{-}} (CH_3)_3C-OH + Cl^{-}$ proceeds well in a more polar medium.
In the light of the above statements,choose the correct answer from the options given below.