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Which of the following is incorrect? [2001]
- a)NaHSO3 is used in detection of carbonylcompound
- b)FeCl3 is used in detection of phenolic group
- c)Tollen reagent is used in detection ofunsaturation
- d)Fehling solution is used in detection ofglucose
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Which of the following is incorrect? [2001]a)NaHSO3 is used in detecti...
Tollen's reagent is used to detect of
aldehydes. Tollen's reagent is an ammonical
solution of silver nitrate. When aldehyde is
added to Tollen's reagent, silver oxide is
reduced to metallic silver which deposits as
mirror.
aldehydes. Tollen's reagent is an ammonical
solution of silver nitrate. When aldehyde is
added to Tollen's reagent, silver oxide is
reduced to metallic silver which deposits as
mirror.
Most Upvoted Answer
Which of the following is incorrect? [2001]a)NaHSO3 is used in detecti...
Incorrect Statement: Tollen reagent is used in the detection of unsaturation.
Explanation:
- Tollen's reagent is a solution of silver nitrate (AgNO3) and ammonia (NH3) in water. It is used as a test for the presence of aldehydes.
- The reaction between Tollen's reagent and aldehydes is called the silver mirror test.
- In the presence of aldehydes, Tollen's reagent is reduced to metallic silver, which forms a silver mirror on the inner surface of the test tube or container.
- The reaction can be represented as follows:
2Ag(NH3)2OH + RCHO → 2Ag + RCOOH + 4NH3 + H2O
- The silver mirror test is a qualitative test that is used to confirm the presence of aldehydes in a given compound.
Other Options:
a) NaHSO3 is used in the detection of carbonyl compounds:
- NaHSO3 (sodium bisulfite) is commonly used to detect the presence of carbonyl compounds such as aldehydes and ketones.
- It reacts with the carbonyl group, forming a bisulfite adduct that can be easily identified.
b) FeCl3 is used in the detection of phenolic groups:
- FeCl3 (ferric chloride) is commonly used to detect the presence of phenolic groups in organic compounds.
- It forms a colored complex with phenols, resulting in a color change that can be observed.
d) Fehling solution is used in the detection of glucose:
- Fehling's solution is a mixture of copper sulfate (CuSO4) and sodium potassium tartrate (Rochelle salt).
- It is commonly used to detect the presence of reducing sugars, such as glucose, in a given compound.
- In the presence of reducing sugars, Fehling's solution is reduced, forming a brick-red precipitate of copper(I) oxide.
Therefore, the incorrect statement is option C: Tollen reagent is used in the detection of unsaturation.
Explanation:
- Tollen's reagent is a solution of silver nitrate (AgNO3) and ammonia (NH3) in water. It is used as a test for the presence of aldehydes.
- The reaction between Tollen's reagent and aldehydes is called the silver mirror test.
- In the presence of aldehydes, Tollen's reagent is reduced to metallic silver, which forms a silver mirror on the inner surface of the test tube or container.
- The reaction can be represented as follows:
2Ag(NH3)2OH + RCHO → 2Ag + RCOOH + 4NH3 + H2O
- The silver mirror test is a qualitative test that is used to confirm the presence of aldehydes in a given compound.
Other Options:
a) NaHSO3 is used in the detection of carbonyl compounds:
- NaHSO3 (sodium bisulfite) is commonly used to detect the presence of carbonyl compounds such as aldehydes and ketones.
- It reacts with the carbonyl group, forming a bisulfite adduct that can be easily identified.
b) FeCl3 is used in the detection of phenolic groups:
- FeCl3 (ferric chloride) is commonly used to detect the presence of phenolic groups in organic compounds.
- It forms a colored complex with phenols, resulting in a color change that can be observed.
d) Fehling solution is used in the detection of glucose:
- Fehling's solution is a mixture of copper sulfate (CuSO4) and sodium potassium tartrate (Rochelle salt).
- It is commonly used to detect the presence of reducing sugars, such as glucose, in a given compound.
- In the presence of reducing sugars, Fehling's solution is reduced, forming a brick-red precipitate of copper(I) oxide.
Therefore, the incorrect statement is option C: Tollen reagent is used in the detection of unsaturation.
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Community Answer
Which of the following is incorrect? [2001]a)NaHSO3 is used in detecti...
Y not d??? Fehling solution is also used in testing for aldehyde
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Which of the following is incorrect? [2001]a)NaHSO3 is used in detection of carbonylcompoundb)FeCl3 is used in detection of phenolic groupc)Tollen reagent is used in detection ofunsaturationd)Fehling solution is used in detection ofglucoseCorrect answer is option 'C'. Can you explain this answer?
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Which of the following is incorrect? [2001]a)NaHSO3 is used in detection of carbonylcompoundb)FeCl3 is used in detection of phenolic groupc)Tollen reagent is used in detection ofunsaturationd)Fehling solution is used in detection ofglucoseCorrect answer is option 'C'. 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 is incorrect? [2001]a)NaHSO3 is used in detection of carbonylcompoundb)FeCl3 is used in detection of phenolic groupc)Tollen reagent is used in detection ofunsaturationd)Fehling solution is used in detection ofglucoseCorrect answer is option 'C'. 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 is incorrect? [2001]a)NaHSO3 is used in detection of carbonylcompoundb)FeCl3 is used in detection of phenolic groupc)Tollen reagent is used in detection ofunsaturationd)Fehling solution is used in detection ofglucoseCorrect answer is option 'C'. Can you explain this answer?.
Which of the following is incorrect? [2001]a)NaHSO3 is used in detection of carbonylcompoundb)FeCl3 is used in detection of phenolic groupc)Tollen reagent is used in detection ofunsaturationd)Fehling solution is used in detection ofglucoseCorrect answer is option 'C'. 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 is incorrect? [2001]a)NaHSO3 is used in detection of carbonylcompoundb)FeCl3 is used in detection of phenolic groupc)Tollen reagent is used in detection ofunsaturationd)Fehling solution is used in detection ofglucoseCorrect answer is option 'C'. 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 is incorrect? [2001]a)NaHSO3 is used in detection of carbonylcompoundb)FeCl3 is used in detection of phenolic groupc)Tollen reagent is used in detection ofunsaturationd)Fehling solution is used in detection ofglucoseCorrect answer is option 'C'. Can you explain this answer?.
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Which of the following is incorrect? [2001]a)NaHSO3 is used in detection of carbonylcompoundb)FeCl3 is used in detection of phenolic groupc)Tollen reagent is used in detection ofunsaturationd)Fehling solution is used in detection ofglucoseCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for Which of the following is incorrect? [2001]a)NaHSO3 is used in detection of carbonylcompoundb)FeCl3 is used in detection of phenolic groupc)Tollen reagent is used in detection ofunsaturationd)Fehling solution is used in detection ofglucoseCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of Which of the following is incorrect? [2001]a)NaHSO3 is used in detection of carbonylcompoundb)FeCl3 is used in detection of phenolic groupc)Tollen reagent is used in detection ofunsaturationd)Fehling solution is used in detection ofglucoseCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which of the following is incorrect? [2001]a)NaHSO3 is used in detection of carbonylcompoundb)FeCl3 is used in detection of phenolic groupc)Tollen reagent is used in detection ofunsaturationd)Fehling solution is used in detection ofglucoseCorrect answer is option 'C'. Can you explain this answer? tests, examples and also practice Class 12 tests.
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