Class 12 Exam > Class 12 Questions > Directions: These questions consist of two st...
Start Learning for Free
Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.
Assertion : Alkylbenzene is not prepared by Friedel-Crafts alkylation of benzene.
Reason : Alkyl halides are less reactive than acyl halides.
Assertion : Alkylbenzene is not prepared by Friedel-Crafts alkylation of benzene.
Reason : Alkyl halides are less reactive than acyl halides.
- a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
- b)If the Assertion is correct but Reason is incorrect.
- c)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
- d)If both the Assertion and Reason are incorrect.
Correct answer is option 'C'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
Directions: These questions consist of two statements, each printed as...
Assertion: Alkylbenzene is not prepared by Friedel-Crafts Alkylation of benzene
The monoalkyl derivative that is first formed readily undergoes further alkylation fast in order to prepare polysubstituted products and isomeric change may occur to alkyl halide and separation of the products is not easy. Due to these obstacles, Friedel-Crafts alkylation of benzene does not prepare alkyl benzene.
Reason: Alkyl halides are less reactive than acyl halides
The C atoms of alkyl halides are less electrophilic than the C atom of carbonyl. So, Alkyl halides are less reactive than acyl halides.
The monoalkyl derivative that is first formed readily undergoes further alkylation fast in order to prepare polysubstituted products and isomeric change may occur to alkyl halide and separation of the products is not easy. Due to these obstacles, Friedel-Crafts alkylation of benzene does not prepare alkyl benzene.
Reason: Alkyl halides are less reactive than acyl halides
The C atoms of alkyl halides are less electrophilic than the C atom of carbonyl. So, Alkyl halides are less reactive than acyl halides.
Most Upvoted Answer
Directions: These questions consist of two statements, each printed as...
Explanation of the Assertion
The assertion states that "Alkylbenzene is not prepared by Friedel-Crafts alkylation of benzene." This is correct because:
- Friedel-Crafts alkylation typically leads to polysubstitution, making it less ideal for preparing simple alkylbenzenes.
- Alkylbenzene can be synthesized through other methods, such as alkylation of phenols or using toluene.
Explanation of the Reason
The reason given is "Alkyl halides are less reactive than acyl halides." This statement is also correct because:
- Acyl halides are more electrophilic due to the resonance stabilization of the carbonyl group, making them more reactive in electrophilic aromatic substitution.
- Alkyl halides, on the other hand, are less reactive in generating carbocations needed for the Friedel-Crafts reaction.
Relationship Between Assertion and Reason
While both statements are correct, the reasoning does not explain why alkylbenzene is not prepared by Friedel-Crafts alkylation. The reason pertains to the reactivity of alkyl halides in general, but it does not specifically address the issues related to polysubstitution and the alternative methods available for synthesizing alkylbenzenes.
Conclusion
Thus, the correct choice is option 'C':
- Both the Assertion and Reason are correct, but the Reason does not serve as a correct explanation for the Assertion.
The assertion states that "Alkylbenzene is not prepared by Friedel-Crafts alkylation of benzene." This is correct because:
- Friedel-Crafts alkylation typically leads to polysubstitution, making it less ideal for preparing simple alkylbenzenes.
- Alkylbenzene can be synthesized through other methods, such as alkylation of phenols or using toluene.
Explanation of the Reason
The reason given is "Alkyl halides are less reactive than acyl halides." This statement is also correct because:
- Acyl halides are more electrophilic due to the resonance stabilization of the carbonyl group, making them more reactive in electrophilic aromatic substitution.
- Alkyl halides, on the other hand, are less reactive in generating carbocations needed for the Friedel-Crafts reaction.
Relationship Between Assertion and Reason
While both statements are correct, the reasoning does not explain why alkylbenzene is not prepared by Friedel-Crafts alkylation. The reason pertains to the reactivity of alkyl halides in general, but it does not specifically address the issues related to polysubstitution and the alternative methods available for synthesizing alkylbenzenes.
Conclusion
Thus, the correct choice is option 'C':
- Both the Assertion and Reason are correct, but the Reason does not serve as a correct explanation for the Assertion.
|
Explore Courses for Class 12 exam
|
|
Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : Alkylbenzene is not prepared by Friedel-Crafts alkylation of benzene.Reason : Alkyl halides are less reactive than acyl halides.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If the Assertion is correct but Reason is incorrect.c)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.d)If both the Assertion and Reason are incorrect.Correct answer is option 'C'. Can you explain this answer?
Question Description
Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : Alkylbenzene is not prepared by Friedel-Crafts alkylation of benzene.Reason : Alkyl halides are less reactive than acyl halides.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If the Assertion is correct but Reason is incorrect.c)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.d)If both the Assertion and Reason are incorrect.Correct answer is option 'C'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : Alkylbenzene is not prepared by Friedel-Crafts alkylation of benzene.Reason : Alkyl halides are less reactive than acyl halides.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If the Assertion is correct but Reason is incorrect.c)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.d)If both the Assertion and Reason are incorrect.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : Alkylbenzene is not prepared by Friedel-Crafts alkylation of benzene.Reason : Alkyl halides are less reactive than acyl halides.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If the Assertion is correct but Reason is incorrect.c)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.d)If both the Assertion and Reason are incorrect.Correct answer is option 'C'. Can you explain this answer?.
Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : Alkylbenzene is not prepared by Friedel-Crafts alkylation of benzene.Reason : Alkyl halides are less reactive than acyl halides.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If the Assertion is correct but Reason is incorrect.c)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.d)If both the Assertion and Reason are incorrect.Correct answer is option 'C'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : Alkylbenzene is not prepared by Friedel-Crafts alkylation of benzene.Reason : Alkyl halides are less reactive than acyl halides.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If the Assertion is correct but Reason is incorrect.c)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.d)If both the Assertion and Reason are incorrect.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : Alkylbenzene is not prepared by Friedel-Crafts alkylation of benzene.Reason : Alkyl halides are less reactive than acyl halides.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If the Assertion is correct but Reason is incorrect.c)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.d)If both the Assertion and Reason are incorrect.Correct answer is option 'C'. Can you explain this answer?.
Solutions for Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : Alkylbenzene is not prepared by Friedel-Crafts alkylation of benzene.Reason : Alkyl halides are less reactive than acyl halides.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If the Assertion is correct but Reason is incorrect.c)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.d)If both the Assertion and Reason are incorrect.Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free.
Here you can find the meaning of Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : Alkylbenzene is not prepared by Friedel-Crafts alkylation of benzene.Reason : Alkyl halides are less reactive than acyl halides.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If the Assertion is correct but Reason is incorrect.c)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.d)If both the Assertion and Reason are incorrect.Correct answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : Alkylbenzene is not prepared by Friedel-Crafts alkylation of benzene.Reason : Alkyl halides are less reactive than acyl halides.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If the Assertion is correct but Reason is incorrect.c)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.d)If both the Assertion and Reason are incorrect.Correct answer is option 'C'. Can you explain this answer?, a detailed solution for Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : Alkylbenzene is not prepared by Friedel-Crafts alkylation of benzene.Reason : Alkyl halides are less reactive than acyl halides.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If the Assertion is correct but Reason is incorrect.c)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.d)If both the Assertion and Reason are incorrect.Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : Alkylbenzene is not prepared by Friedel-Crafts alkylation of benzene.Reason : Alkyl halides are less reactive than acyl halides.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If the Assertion is correct but Reason is incorrect.c)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.d)If both the Assertion and Reason are incorrect.Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : Alkylbenzene is not prepared by Friedel-Crafts alkylation of benzene.Reason : Alkyl halides are less reactive than acyl halides.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If the Assertion is correct but Reason is incorrect.c)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.d)If both the Assertion and Reason are incorrect.Correct answer is option 'C'. Can you explain this answer? tests, examples and also practice Class 12 tests.
|
|
Explore Courses for Class 12 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup