Consider the following bromides.
The correct order of $S_N1$ reactivity is

Which of the following compounds would react faster with $NaCN$ in an $S_N2$ reaction?

Which of the following procedures would be best for achieving the following reaction?

Which of the following products is not formed in the following reaction?
$Vinylcyclopentane + HBr \rightarrow ?$

Given below are two statements:
Statement $I$: $(CH_3)_3C-CH_2-Cl$ will undergo $S_N1$ reaction even though it is a primary halide.
Statement $II$: It will not undergo $S_N2$ reaction very easily even though it is a primary halide.
In the light of the above statements,choose the most appropriate answer from the options given below:

The decreasing order of reactivity of the following organic molecules towards $AgNO_3$ solution is: