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Question: Answered & Verified by Expert
Assertion : Oxidation of 1-nitronaphthalene gives $o$-nitrophthalic acid whereas 1-amino naphthalene on oxidation gives phthalic acid.
Reason: An amino group attached to the benzene ring makes it resistant to oxidation whereas nitro group makes the benzene ring susceptible to oxidation.
ChemistryAminesAIIMSAIIMS 2017
Options:
  • A If both assertion and reason are true and reason is the correct explanation of assertion.
  • B If both assertion and reason are true but reason is not the correct explanation of assertion.
  • C If assertion is true but reason is false.
  • D If both assertion and reason are false.
Solution:
2716 Upvotes Verified Answer
The correct answer is: If assertion is true but reason is false.
An amino group increases the electron density in the benzene ring to which it is attached thereby making it susceptible to oxidation while a nitro group decreases the electron density in the benzene ring to which it is attached thereby making it resistant to oxidation. Instead, the other benzene ring gets oxidised giving $o$-nitrophthalic acid as shown below :

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