Which of the following compounds has maximum volatility?

  • A
    p-Hydroxybenzoic acid
  • B
    m-Hydroxybenzoic acid
  • C
    o-Hydroxybenzoic acid (Salicylic acid)
  • D
    Benzoic acid

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

Write a note on Reimer-Tiemann reaction.

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Which of the following compounds is obtained when phenol reacts with bromine water?

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 $(10.0)$

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Which of the following is the most acidic?

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