Which of the following alkyl halides has the highest boiling point?

Will $CCl_4$ give a white precipitate of $AgCl$ on heating it with silver nitrate? Give a reason for your answer.

$R - X + NaOH \xrightarrow{} ROH + NaX$
The above reaction is classified as:

The correct increasing order of the reactivity of halides for $S_N1$ reaction is

An unknown compound $A$ has the molecular formula $C_5H_9Cl$. It does not react with $Br_2 / CCl_4$. When treated with a strong base,it gives a compound $B$ with the molecular formula $C_5H_8$,which reacts with $Br_2 / CCl_4$. Ozonolysis of $B$ followed by treatment with dimethyl sulfide gives a compound with the molecular formula $C_5H_8O_2$. What is the structure of $A$?

Sodium tertiary butoxide on reaction with methyl bromide produces the product $P$.
Sodium methoxide upon reaction with tertiary butyl bromide generates the product $Q$.
The products $P$ and $Q$ are