Which of the following is incorrect?
Correct answer: B. NaHSO3 is used in detection of carbonyl compounds
- A. Fehling solution is used in detection of glucose
- B. NaHSO3 is used in detection of carbonyl compounds
- C. FeCl3 is used in detection of phenols
- D. Tollen's reagent is used in detection of Aldehyde
Explanation
The correct answer is: Option B: NaHSO3 is used in detection of carbonyl compounds. This statement is incorrect because NaHSO3 is not primarily utilized for the qualitative detection of carbonyl compounds; it is more commonly used to form derivatives or protect carbonyl groups.Option A is correct as Fehling solution indeed detects reducing sugars like glucose.Option C is correct because FeCl3 is used to detect phenols through a color change.Option D is correct because Tollen's reagent is specific for aldehydes, producing a silver mirror as an indication of their presence.
Last updated
About Aldehydes and Ketones
Aldehydes and ketones contain the polar carbonyl group, but aldehydes are generally more readily oxidised and more reactive than ketones. Coverage includes preparation by oxidation or reduction routes, nucleophilic addition of reagents such as hydrogen cyanide and bisulfite, and tests that distinguish aldehydes from ketones.
Practise Aldehydes and Ketones
679 free Aldehydes and Ketones MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.