$C_6H_5OH \xrightarrow{CH_3COCl / NaOH_{(aq)}} C_6H_5OCOCH_3$
The above reaction is an example of which of the following?

When phenol is reacted with $CHCl_3$ and $NaOH$ followed by acidification,salicylaldehyde is obtained. Which of the following species are involved in the above mentioned reaction as intermediates?

The given reaction can occur in the presence of:
$(1)$ Bromine water
$(2)$ $Br_2$ in $CS_2, 273 \ K$
$(3)$ $Br_2 / FeBr_3$
$(4)$ $Br_2$ in $CHCl_3, 273 \ K$
Choose the correct answer from the options given below:
[Image: Phenol reacting to form p-bromophenol as the major product]

Which one of the following is most reactive towards electrophilic attack?

The major product of the following reaction is:

The major product of the following reaction sequence is:
$C_6H_5OH \xrightarrow[(ii) NaOH, (iii) H^+]{(i) CHCl_3, NaOH(aq)} ?$