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  4. Phenolphthalein is obtained by heating phthalic anhydride with conc. textH text2 textSO text4 and

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Q. Phenolphthalein is obtained by heating phthalic anhydride with conc. $\text{H}_{\text{2}} \text{SO}_{\text{4}}$ and

NTA AbhyasNTA Abhyas 2020

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