Question

The condensation product of reaction between phenol and phthalic anhydride:

• A. methyl orange
• B. salicylic acid
• C. phenol red
• D. phenolphthalein

Answer 1

Answer: (D)

Phthalien reaction (phthalein condensation) phenol $+$ phthalic anhydride $\to$ HPh phenophthalien. $HPh$ acts as indicator.