Carbolic acid is oxidised by acidified sodium dichromate to give

Identify $X$ and $Y$ in the following reaction:
$X \xrightarrow{Y} \text{Benzoquinone}$

What is the order of acidic strength for the following compounds?

The phenolic group can be identified by a positive:

Out of the two compounds $A$ ($p$-nitrophenol) and $B$ ($o$-nitrophenol) shown below,the vapour pressure of $B$ at a particular temperature is expected to be:

The major product of the following reaction is: