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Phenol is heated with pthalic anhydride in the presence of concentrated H₂SO₄.The product gives pink colour with alkali. The product is
Options
(a) salicylic acid
(b) bakelite
(c) phenolphthalein
(d) fluorescein
Correct Answer:
phenolphthalein
Explanation:
When phenol is heated with phthalic anhydride and a few drops of concentrated sulphuric acid (H₂SO₄) are added, phenolphthalein is formed. On adding excess of sodium hydroxide to this product, a pink colour is produced. This process is called phthalein fusion test.
Related Questions:
- Which of the following undergoes sublimation
- Which of the following will not undergo Hell-Volhard-Zelinsky reaction
- For adiabatic process,which is correct
- Polyethylene is a resin obtained by polymerization of
- A gas can be liquefied
Topics: Alcohols Phenols and Ethers
(80)
Subject: Chemistry
(2512)
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