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An organic compound on reaction with 2,4-dinitrophenylhydrazine (2,4-DNP) gives a yellow precipitate. It also gives silver mirror on reaction with ammoniacal AgNO3. It gives an alcohol and sodium salt of a carboxylic acid on reaction with concentrated NaOH. It yields benzene-1,2-dicarboxylic acid on heating with alkaline KMnO4. The structure of the compound among the following is
  • a)
  • b)
  • c)
  • d)
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
An organic compound on reaction with 2,4-dinitrophenylhydrazine (2,4-D...
1.ketone and aldehyde both reacts with 2,4-DNP.
2.only aldehyde reacts with ammoniacal AgNO3.(Tollens reagent fails to oxidise ketone). so, ketone would not be substrate.
3. only option C ,which gives benzene- 1,2- dicarboxyclic acid upon oxidation with KMno4.
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Community Answer
An organic compound on reaction with 2,4-dinitrophenylhydrazine (2,4-D...
Both Ketone and Aldehyde react with 2,4- DNP therefore it will either be an Aldehyde or a Ketone. Thus option D gets crossed. As only Aldehydes give silver mirror on reaction with ammoniacal AgNO3 therefore option B also gets crossed as it is a Ketone. Now, the products formed with conc. NaOH can be from either of the compounds as both are aldehydes and give Cannizzaro reaction with conc. NaOH. But, when oxidized with alk. KMnO4, only compound C gives benzene-1,2-dicarboxylic acid. Hence C is the answer.
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An organic compound on reaction with 2,4-dinitrophenylhydrazine (2,4-DNP) gives a yellow precipitate. It also gives silver mirror on reaction with ammoniacal AgNO3. It gives an alcohol and sodium salt of a carboxylic acid on reaction with concentrated NaOH. It yields benzene-1,2-dicarboxylic acid on heating with alkaline KMnO4. The structure of the compound among the following isa)b)c)d)Correct answer is option 'C'. Can you explain this answer?
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An organic compound on reaction with 2,4-dinitrophenylhydrazine (2,4-DNP) gives a yellow precipitate. It also gives silver mirror on reaction with ammoniacal AgNO3. It gives an alcohol and sodium salt of a carboxylic acid on reaction with concentrated NaOH. It yields benzene-1,2-dicarboxylic acid on heating with alkaline KMnO4. The structure of the compound among the following isa)b)c)d)Correct answer is option 'C'. Can you explain this answer? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about An organic compound on reaction with 2,4-dinitrophenylhydrazine (2,4-DNP) gives a yellow precipitate. It also gives silver mirror on reaction with ammoniacal AgNO3. It gives an alcohol and sodium salt of a carboxylic acid on reaction with concentrated NaOH. It yields benzene-1,2-dicarboxylic acid on heating with alkaline KMnO4. The structure of the compound among the following isa)b)c)d)Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An organic compound on reaction with 2,4-dinitrophenylhydrazine (2,4-DNP) gives a yellow precipitate. It also gives silver mirror on reaction with ammoniacal AgNO3. It gives an alcohol and sodium salt of a carboxylic acid on reaction with concentrated NaOH. It yields benzene-1,2-dicarboxylic acid on heating with alkaline KMnO4. The structure of the compound among the following isa)b)c)d)Correct answer is option 'C'. Can you explain this answer?.
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