Which of the following is not expected to be intermediate of the following reaction?

The correct order of ${\mathrm{S}}_{\mathrm{N}}1$reaction rate in the following compound is:

Consider the following compounds:

Give the decreasing order of ${\mathrm{S}}_{\mathrm{N}}1$ reactivity of the above compounds:

Arrange the following compounds in order of increasing reactivity towards ${\mathrm{S}}_{\mathrm{N}}1$ reaction.

Product (P) is:

According to ${\mathrm{S}}_{\mathrm{N}}2$ reaction, which is the major product for the following reaction?

Compare the rate of reaction in the following reactions.