Consider the following ${\mathrm{E}}_1/{\mathrm{S}}_{\mathrm{N}}1$ reaction:

The missing product (s) is (are):

Which of the following structures are possible products?

Choose the reaction in each of the following pairs that proceeds at the faster rate. Explain your reasoning.

The reaction of ethyl bromide with phenol or with the sodium salt of phenol.

Choose the reaction in each of the following pairs that proceeds at a faster rate. Explain your reasoning.

Bromination of phenol or phenyl acetate.

In the following compounds, the order of acidity is:

The product of the following reaction is: