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Nitrobenzene can be prepared from benzene byusing a mixture of conc. HNO3 and conc. H2SO4 in the mixture, nitric acid acts as a/an: [2009]
- a)acid
- b)base
- c)catalyst
- d)reducing agent
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Nitrobenzene can be prepared from benzene byusing a mixture of conc. H...
Nitric acid acts as a base by accepting a proton.
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Nitrobenzene can be prepared from benzene byusing a mixture of conc. H...
Preparation of Nitrobenzene
Nitrobenzene is synthesized from benzene using a mixture of concentrated nitric acid (HNO3) and concentrated sulfuric acid (H2SO4). The role of nitric acid in this reaction is crucial for the formation of the nitro group.
Role of Nitric Acid
- In this reaction, nitric acid primarily serves as a source of the nitronium ion (NO2+), which is the active electrophile that attacks the benzene ring.
- The generation of the nitronium ion is facilitated by the strong acidic environment provided by sulfuric acid, which acts to protonate the nitric acid, leading to its dehydrolysis.
Why is it a Base?
- Although nitric acid is often considered an acid, in this context, it can be viewed as a base because it accepts a proton (H+) from sulfuric acid to form the nitronium ion.
- This behavior is characteristic of acids that can also act as Bronsted-Lowry bases in certain reactions. Thus, nitric acid acts as a base in the formation of the nitronium ion.
Summary of the Reaction
- Benzene (C6H6) reacts with the electrophile NO2+ to ultimately form nitrobenzene (C6H5NO2).
- The balanced equation for this electrophilic aromatic substitution showcases the conversion of benzene to nitrobenzene with the release of a proton.
Conclusion
- Therefore, in the specific context of this reaction, the correct answer is that nitric acid acts as a base, contributing to the formation of the nitronium ion necessary for the nitration of benzene, leading to the production of nitrobenzene.
Nitrobenzene is synthesized from benzene using a mixture of concentrated nitric acid (HNO3) and concentrated sulfuric acid (H2SO4). The role of nitric acid in this reaction is crucial for the formation of the nitro group.
Role of Nitric Acid
- In this reaction, nitric acid primarily serves as a source of the nitronium ion (NO2+), which is the active electrophile that attacks the benzene ring.
- The generation of the nitronium ion is facilitated by the strong acidic environment provided by sulfuric acid, which acts to protonate the nitric acid, leading to its dehydrolysis.
Why is it a Base?
- Although nitric acid is often considered an acid, in this context, it can be viewed as a base because it accepts a proton (H+) from sulfuric acid to form the nitronium ion.
- This behavior is characteristic of acids that can also act as Bronsted-Lowry bases in certain reactions. Thus, nitric acid acts as a base in the formation of the nitronium ion.
Summary of the Reaction
- Benzene (C6H6) reacts with the electrophile NO2+ to ultimately form nitrobenzene (C6H5NO2).
- The balanced equation for this electrophilic aromatic substitution showcases the conversion of benzene to nitrobenzene with the release of a proton.
Conclusion
- Therefore, in the specific context of this reaction, the correct answer is that nitric acid acts as a base, contributing to the formation of the nitronium ion necessary for the nitration of benzene, leading to the production of nitrobenzene.
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Nitrobenzene can be prepared from benzene byusing a mixture of conc. HNO3 and conc. H2SO4 in the mixture, nitric acid acts as a/an: [2009]a)acidb)basec)catalystd)reducing agentCorrect answer is option 'B'. 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 Nitrobenzene can be prepared from benzene byusing a mixture of conc. HNO3 and conc. H2SO4 in the mixture, nitric acid acts as a/an: [2009]a)acidb)basec)catalystd)reducing agentCorrect answer is option 'B'. 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 Nitrobenzene can be prepared from benzene byusing a mixture of conc. HNO3 and conc. H2SO4 in the mixture, nitric acid acts as a/an: [2009]a)acidb)basec)catalystd)reducing agentCorrect answer is option 'B'. Can you explain this answer?.
Nitrobenzene can be prepared from benzene byusing a mixture of conc. HNO3 and conc. H2SO4 in the mixture, nitric acid acts as a/an: [2009]a)acidb)basec)catalystd)reducing agentCorrect answer is option 'B'. 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 Nitrobenzene can be prepared from benzene byusing a mixture of conc. HNO3 and conc. H2SO4 in the mixture, nitric acid acts as a/an: [2009]a)acidb)basec)catalystd)reducing agentCorrect answer is option 'B'. 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 Nitrobenzene can be prepared from benzene byusing a mixture of conc. HNO3 and conc. H2SO4 in the mixture, nitric acid acts as a/an: [2009]a)acidb)basec)catalystd)reducing agentCorrect answer is option 'B'. Can you explain this answer?.
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