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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 : Reimer-Tiemann reaction of phenol with CCl4 in NaOH at 340 K gives salicyclic acid as the major product.
Reason : The reaction occurs through intermediate formation of dichlorocarbene.
  • a)
    If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
  • b)
    If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
  • c)
    If the Assertion is correct but Reason is incorrect.
  • d)
    If both the Assertion and Reason are incorrect.
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Directions: These questions consist of two statements, each printed as...
Nucleophilic attack of phenolate ion through the ortho-carbon atom occurs on CCl4 to form an intermediate which on hydrolysis gives salicylic acid.
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Directions: These questions consist of two statements, each printed as...
Explanation:

  • Assertion: Reimer-Tiemann reaction of phenol with CCl4 in NaOH at 340 K gives salicyclic acid as the major product.

  • Reason: The reaction occurs through intermediate formation of dichlorocarbene.



The correct option is (c) If the Assertion is correct but Reason is incorrect.

Explanation:

  • The Reimer-Tiemann reaction is a chemical reaction used for the ortho-formylation of phenols.

  • In this reaction, phenol is treated with chloroform (CHCl3) and sodium hydroxide (NaOH) to give salicylaldehyde.

  • However, when phenol is treated with carbon tetrachloride (CCl4) and NaOH at 340 K, the major product obtained is salicylic acid.

  • This reaction is called the Reimer-Tiemann reaction of phenol with CCl4 in NaOH.

  • The reaction mechanism involves the formation of dichlorocarbene (CCl2) as an intermediate.

  • The CCl2 intermediate reacts with phenol to form salicylic acid.

  • Therefore, the Assertion is correct as the Reimer-Tiemann reaction of phenol with CCl4 in NaOH at 340 K gives salicylic acid as the major product.

  • However, the Reason is incorrect because the intermediate formed in the reaction is not dichlorocarbene, but it is trichloromethoxide (CCl3O-).

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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 : Reimer-Tiemann reaction of phenol with CCl4 in NaOH at 340 K gives salicyclic acid as the major product.Reason : The reaction occurs through intermediate formation of dichlorocarbene.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.c)If the Assertion is correct but Reason is incorrect.d)If both the Assertion and Reason are incorrect.Correct answer is option 'C'. Can you explain this answer?
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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 : Reimer-Tiemann reaction of phenol with CCl4 in NaOH at 340 K gives salicyclic acid as the major product.Reason : The reaction occurs through intermediate formation of dichlorocarbene.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.c)If the Assertion is correct but Reason is incorrect.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 : Reimer-Tiemann reaction of phenol with CCl4 in NaOH at 340 K gives salicyclic acid as the major product.Reason : The reaction occurs through intermediate formation of dichlorocarbene.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.c)If the Assertion is correct but Reason is incorrect.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 : Reimer-Tiemann reaction of phenol with CCl4 in NaOH at 340 K gives salicyclic acid as the major product.Reason : The reaction occurs through intermediate formation of dichlorocarbene.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.c)If the Assertion is correct but Reason is incorrect.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 : Reimer-Tiemann reaction of phenol with CCl4 in NaOH at 340 K gives salicyclic acid as the major product.Reason : The reaction occurs through intermediate formation of dichlorocarbene.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.c)If the Assertion is correct but Reason is incorrect.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.
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