Electrophilic substitution reaction in phenol takes place at:

Ortho and para nitrophenols are more acidic than phenol. Draw the resonance structures of the corresponding phenoxide ions.

The increasing order of $pKa$ values of the following compounds is:

Which of the following compounds $(i)$ and $(ii)$ will not react with a mixture of $NaBr$ and $H_{2}SO_{4}$? Explain why?
$(i)$ $CH_{3}CH_{2}CH_{2}OH$
$(ii)$ Phenol (as shown in the image)

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 $(10.0)$

The increasing order of boiling points of the following compounds is: