| ⇦ | 
| ⇨ |
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 one of the following is a false statement
- Glycerol on treated with oxalic acid gives
- The bond dissociation energies of H₂, Cl₂ and HCl are 104, 58, and 103
- In the equation of state of an ideal gas PV = nRT, the value of the universal gas
- According to IUPAC nomenclature sodium nitroprusside is named as
Topics: Alcohols Phenols and Ethers
(80)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which one of the following is a false statement
- Glycerol on treated with oxalic acid gives
- The bond dissociation energies of H₂, Cl₂ and HCl are 104, 58, and 103
- In the equation of state of an ideal gas PV = nRT, the value of the universal gas
- According to IUPAC nomenclature sodium nitroprusside is named as
Topics: Alcohols Phenols and Ethers (80)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply