Thymol,which is primarily a derivative of phenol,is used in which of the following?

By passing vapours of phenol over heated $zinc$ dust will produce :

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

Which of the following is the major product,when $p$-cresol is treated with zinc dust?

The reactant is $4-hydroxy-3-methylbenzenesulfonic acid$. The reaction with $Br_2$ in $H_2O$ (bromine water) is an electrophilic aromatic substitution. The $-OH$ group is strongly activating and ortho/para directing. The $-SO_3H$ group is a good leaving group in the presence of excess bromine water. Predict the product of the reaction: $\xrightarrow{Br_2, H_2O} \text{Product}$

The major product in the following reaction is: