JEE Main 2014 · 12 Apr · Shift 1 · Chemistry Q60

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ChemistrySingle correct+4 / -1Question 60 of 90

Phthalic acid reacts with resorcinol in the presence of concentrated $\ce{H2SO4}$ to give :

Phenolphthalein

Alizarin

Coumarin

Fluorescein

Answer and worked solution

Official answer: D

Phthalic acid (or anhydride) condenses with two molecules of resorcinol under conc. $\ce{H2SO4}$ to give fluorescein. With phenol it gives phenolphthalein.

Topics:Phenols

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JEE Main 2014 · 12 Apr · Shift 1, Chemistry question 60