Phenolphthalein is obtained by heating phthalic anhydride with conc. $H_2SO_4$ and

What is the product obtained when vapours of phenol are passed over heated zinc dust?

The heating of phenyl methyl ether with $HI$ produces an aromatic compound $A$ which on treatment with conc. $HNO_3$ gives $B$. $A$ and $B$ respectively are

Which of the following processes does not give benzene as a product?

Which of the following does not give effervescence with $NaHCO_3$?

When $Phenol$ is heated with $phthalic \ anhydride$ in concentrated $sulphuric \ acid$ and the hot reaction mixture is poured into a dilute solution of $sodium \ hydroxide$,the product formed is