The electrophile involved in the below reaction is:

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

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: $\xrightarrow{Br_2, H_2O} \text{Product}$

Phenol condenses with phthalic anhydride in the presence of conc. $H_2SO_4$ to form:

In the following reaction,what is the product $X$?

The order of melting point of ortho-,meta-,and para-nitrophenol is