$A$ compound $x$ reacts with Bromine water and gives a white precipitate. If compound $x$ reacts with $Zn$ dust and forms benzene,then $x$ is:

Give the conversion of phenol to salicylaldehyde.

The reactivity of compound $Z$ with different halogens under appropriate conditions is given below:
(Image of reaction: $Z$ ($3$-tert-butylphenol) reacts with $X_2$ to give mono-halo derivative for $X_2 = I_2$,di-halo for $X_2 = Br_2$,and tri-halo for $X_2 = Cl_2$)
The observed pattern of electrophilic substitution can be explained by:
$A$. The steric effect of the halogen
$B$. The steric effect of the tert-butyl group
$C$. The electronic effect of the phenolic group
$D$. The electronic effect of the tert-butyl group

Which of the following is the weakest acid?

What are the products formed by the reaction of phenol with dilute $HNO_3$? By which method are these products separated,and what is the name of the compound that separates out and the reason for it?

Identify the product in the following reaction: $Phenol \xrightarrow{CrO_3} \text{Product}$