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Which of the following statements is incorrect?
  • a)
    The substitution of hydroxyl group by a halogen group in alcohol is an electrophilic substitution reaction.
  • b)
    Alcohols are weak acids as well as weak bases.
  • c)
    A secondary alcohol, on oxidation, gives a carboxylic acid containing the lesser number of carbon atoms.
  • d)
    A primary alcohol, on oxidation, gives a carboxylic acid containing the same number of carbon atoms.
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
Which of the following statements is incorrect?a)The substitution of ...
(1) Replacement of -OH by a halogen in an alcohol is nucleophilic substitution reaction. It is the protonted alcohol which acts as a substrate.
(2) Alcohols are acidic enough to react with active metals to liberate hydrogen gas. They are basic enough to accept a proton from strong acids.
(3) Secondary alcohols, on oxidation, give a ketone containing the same number of carbon atoms. Further oxidation will give carboxylic acid containing lesser number of carbon atoms.
(4) Primary alcohols, on oxidation, give an aldehyde containing the same number of carbon atoms. Further oxidation will give carboxylic acid containing the same number of carbon atoms.
Hence, only option (1) is incorrect.
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Community Answer
Which of the following statements is incorrect?a)The substitution of ...
Incorrect Statement: The substitution of hydroxyl group by a halogen group in alcohol is an electrophilic substitution reaction.

Explanation:
Electrophilic substitution reaction:
An electrophilic substitution reaction involves the substitution of an atom or a group in a molecule by an electrophile. In this reaction, the electrophile attacks the molecule and replaces one of its atoms or groups.

Substitution of hydroxyl group by a halogen group in alcohol:
When a hydroxyl group (-OH) in an alcohol is substituted by a halogen group (e.g., Cl, Br, or I), it is not an electrophilic substitution reaction. Instead, it is a nucleophilic substitution reaction.

Nucleophilic substitution reaction:
A nucleophilic substitution reaction involves the substitution of an atom or a group in a molecule by a nucleophile. In this reaction, the nucleophile attacks the molecule and replaces one of its atoms or groups.

Explanation of the incorrect statement:
The incorrect statement is option A, which states that the substitution of hydroxyl group by a halogen group in alcohol is an electrophilic substitution reaction. This statement is incorrect because the substitution of hydroxyl group by a halogen group in alcohol is actually a nucleophilic substitution reaction, not an electrophilic substitution reaction.

In a nucleophilic substitution reaction of alcohols, the hydroxyl group (-OH) is replaced by a halogen group (-X) in the presence of a halogenating agent, such as phosphorus halides (e.g., PCl5, PCl3, PBr3, PI3) or thionyl chloride (SOCl2).

The reaction mechanism involves the attack of the nucleophile (-X) on the carbon atom of the alcohol, leading to the formation of an alkyl halide. The nucleophile donates its electron pair to the carbon atom, resulting in the substitution of the hydroxyl group.

Overall, the substitution of hydroxyl group by a halogen group in alcohol is a nucleophilic substitution reaction, not an electrophilic substitution reaction, making option A incorrect.
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Which of the following statements is incorrect?a)The substitution of hydroxyl group by a halogen group in alcohol is an electrophilic substitution reaction.b)Alcohols are weak acids as well as weak bases.c)A secondary alcohol, on oxidation, gives a carboxylic acid containing the lesser number of carbon atoms.d)A primary alcohol, on oxidation, gives a carboxylic acid containing the same number of carbon atoms.Correct answer is option 'A'. Can you explain this answer?
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Which of the following statements is incorrect?a)The substitution of hydroxyl group by a halogen group in alcohol is an electrophilic substitution reaction.b)Alcohols are weak acids as well as weak bases.c)A secondary alcohol, on oxidation, gives a carboxylic acid containing the lesser number of carbon atoms.d)A primary alcohol, on oxidation, gives a carboxylic acid containing the same number of carbon atoms.Correct answer is option 'A'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Which of the following statements is incorrect?a)The substitution of hydroxyl group by a halogen group in alcohol is an electrophilic substitution reaction.b)Alcohols are weak acids as well as weak bases.c)A secondary alcohol, on oxidation, gives a carboxylic acid containing the lesser number of carbon atoms.d)A primary alcohol, on oxidation, gives a carboxylic acid containing the same number of carbon atoms.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is incorrect?a)The substitution of hydroxyl group by a halogen group in alcohol is an electrophilic substitution reaction.b)Alcohols are weak acids as well as weak bases.c)A secondary alcohol, on oxidation, gives a carboxylic acid containing the lesser number of carbon atoms.d)A primary alcohol, on oxidation, gives a carboxylic acid containing the same number of carbon atoms.Correct answer is option 'A'. Can you explain this answer?.
Solutions for Which of the following statements is incorrect?a)The substitution of hydroxyl group by a halogen group in alcohol is an electrophilic substitution reaction.b)Alcohols are weak acids as well as weak bases.c)A secondary alcohol, on oxidation, gives a carboxylic acid containing the lesser number of carbon atoms.d)A primary alcohol, on oxidation, gives a carboxylic acid containing the same number of carbon atoms.Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for JEE. Download more important topics, notes, lectures and mock test series for JEE Exam by signing up for free.
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