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Class 12 Exam  >  Class 12 Questions  >  Which of the following amine liberates nitrog... Start Learning for Free
Which of the following amine liberates nitrogen gas on reaction with HNO2 ?
  • a)
    (CH3)2NH
  • b)
    (CH3)3 N
  • c)
    C6H5 NH2
  • d)
    CH3NH2
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
Which of the following amine liberates nitrogen gas on reaction with H...
The correct answer is Option D.
Only primary amines liberate nitrogen gas on reaction with HNO2.
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Which of the following amine liberates nitrogen gas on reaction with H...
Reaction of Amines with HNO2

Amines react with nitrous acid (HNO2) to form nitrosamines. During this reaction, nitrogen gas is liberated.

The reaction can be represented as follows:

R-NH2 + HNO2 → R-NO + H2O + N2

In this reaction, the amine acts as a nucleophile and attacks the nitrous acid to form a nitrosonium ion and water. The nitrosonium ion then reacts with another amine molecule to form a nitrosamine and nitrogen gas.

Answer Explanation

Out of the given options, only CH3NH2 is an amine. Therefore, it will react with HNO2 to liberate nitrogen gas.

Option A: (CH3)2NH is a secondary amine and will react with HNO2 to form a nitrosamine but will not liberate nitrogen gas.

Option B: (CH3)3N is a tertiary amine and will not react with HNO2 as tertiary amines do not react with nitrous acid.

Option C: C6H5NH2 is an aromatic primary amine and will react with HNO2 to form a diazonium salt but will not liberate nitrogen gas.

Therefore, the correct answer is option D: CH3NH2.
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Which of the following amine liberates nitrogen gas on reaction with HNO2?a)(CH3)2NHb)(CH3)3Nc)C6H5NH2d)CH3NH2Correct answer is option 'D'. Can you explain this answer?
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Which of the following amine liberates nitrogen gas on reaction with HNO2?a)(CH3)2NHb)(CH3)3Nc)C6H5NH2d)CH3NH2Correct answer is option 'D'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Which of the following amine liberates nitrogen gas on reaction with HNO2?a)(CH3)2NHb)(CH3)3Nc)C6H5NH2d)CH3NH2Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following amine liberates nitrogen gas on reaction with HNO2?a)(CH3)2NHb)(CH3)3Nc)C6H5NH2d)CH3NH2Correct answer is option 'D'. Can you explain this answer?.
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