MCQ
Phenolphthalein is obtained by heating phthalic anhydride with conc. ${H_2}S{O_4}$ and
  • A
    Benzyl alcohol
  • B
    Benzene
  • Phenol
  • D
    Benzoic acid

Answer

Correct option: C.
Phenol
c
(c)

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$\begin{array}{*{20}{c}}
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  {\,\,\,|{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,\,\,\,\,\,\,\,\,{\mkern 1mu} {\mkern 1mu} ||} \\ 
  {C{H_3} - CH - C - OH} 
\end{array}$ $+ C{H_3} - N{H_2} \to 'A'\xrightarrow[\Delta ]{}'B'\xrightarrow{\begin{subarray}{l} 
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$(1)$ $C{H_3}C{H_2}C{H_2}Cl + $ $\begin{array}{*{20}{c}}
  {\,\begin{array}{*{20}{c}}
  {\,\,\,\,\,\,\,\,\,\,C{H_3}} \\ 
  {\,\,\,|} 
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  {\,\,\,|} \\ 
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  {\,\,\,|} 
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