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Phthalic acid reacts with resorcinol in the presence of concentrated $H_{2} {SO}_{4}$ to give:

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Phenolphthalein

Alizarin

Coumarin

Fluorescein [

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detailed solution

Correct option is D

The product of fluorescein

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Phthalic acid reacts with resorcinol in the presence of concentrated H2SO4 to give: