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QJEEM21Ch7934: JEE Main 2021 Chemistry - Class 12 JEEM21Ch7934 Solution: Which of the following compound gives pink colour on reaction…

Which of the following compound gives pink colour on reaction with phthalic anhydride in conc. H2SO4 followed by treatment with NaOH ?

Multiple Choice Options

  • A https://ik.imagekit.io/novatra/photos/343f6aefdd280a8b7e942ef2e340564171afb04790915b2c78e4a4b6ff9cc3b4.webp
  • B https://ik.imagekit.io/novatra/photos/f6eccf7c1144e88e36ce3cc874256d2fdfc12945002c77583286830b40827730.webp
  • C https://ik.imagekit.io/novatra/photos/fb195c4453de84bc7877d0caf1d3e52c5fa4d473223749f3057240580f211a66.webp
  • D https://ik.imagekit.io/novatra/photos/10361ae0e3e06ca5d11a7ab1ec66bb3e85361f12aa4df84fcc70ae2d15f98537.webp

Step-by-Step Verified Solution

Firstly phthalic anhydride in presence of conc. H2SO4 undergoes protonation to give an intermediate carbocation. This carbocation reacts with 2-propylphenol in presence of NaOH to give pink colour compound. JEE Main 2021 (Online) 24th February Morning Shift Chemistry - Alcohols, Phenols and Ethers Question 109 English Explanation

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