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

  • A
    Benzyl alcohol
  • B
    Benzene
  • C
    Phenol
  • D
    Benzoic acid

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How can picric acid and benzoic acid be distinguished?

Identify the missing reagent in the following reaction:

The product $(B)$ will be:

Among $(i)-(iii)$,the boiling point follows the order:

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