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Aldehydes Ketones and Carboxylic Acids question

2001 · Q122
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Aldehydes Ketones and Carboxylic Acids question

2001 · Q122

NEETChemistryAldehydes Ketones and Carboxylic AcidsMCQ+4 / −1
Which of the following is incorrect?
  1. A
    FeCl3 is used in detection of phenol.
  2. B
    Fehling solution is used in detection of glucose
  3. C
    Tollen's reagent is used in detection of unsaturation.
  4. D
    NaHSO3 is used in detection of carbonyl compound.
View written solutionFree

Correct answer: C

Tollen's reagent is used to detect aldehydic group. 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.

RCHO + Ag2O →\to→ RCOOH + 2Ag

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