Benzoic acid on heating with $X$ gives benzene and phenol on heating with $Y$ gives benzene. What are $X$ and $Y$ respectively?

$A$ compound that easily undergoes bromination is

Which of the following compounds decolourises $Br_2 / H_2O$ and also gives a positive test with neutral $FeCl_3$?

Product $(A)$ and $(B)$ respectively are $:-$

Some compounds and their $pK_a$ values are given. Arrange them in decreasing order of their acidic strength.
$(i)$ Ethanol $(15.9)$,Phenol $(10.0)$,Cresol $(10.1)$,Water $(15.7)$
$(ii)$ $o$-Nitrophenol $(7.2)$,$m$-Nitrophenol $(8.3)$,Ethanol $(15.9)$,Water $(15.7)$,Phenol $(10.0)$

Identify the type of reaction shown in the following chemical equation:
$C_6H_5OH + 3Br_2 \rightarrow C_6H_2Br_3OH + 3HBr$