Question

Phthalic acid reacts with resorcinol in the presence of concentrated h2so4 to give

Answer 1

Hey Dear,

◆ Answer -

Phthalic acid reacts with resorcinol in the presence of concentrated h2so4 to give fluorescein.

● Reaction -

Phthalic acid gets dehydrated on treatment with concentrated H2SO4 to form phthalic anhydride.

Phthalic acid + Conc.H2SO4 --> Phthalic anhydride

Phthalic anhydride further reacts with resorsinol to form fluorescin.

Phthalic anhydride + resorcinol --> Fluorescein

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