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Which of the following is incorrect?

Options

  1. AF e C l 3 is used in detection of phenol
  2. BFehling solution is used in detection of glucose
  3. CTollen's reagent is used in detection of unsaturation
  4. DN a H S O 3 is used in detection of carbonyl compound

Correct answer

C. Tollen's reagent is used in detection of unsaturation

Step-by-step solution

Tollen's reagent is a solutionof ammoniacal silver nitrate and used for the detection of - C H O group. Aldehydes reduce Tollen's reagent and itself get oxidised to give A g + ions to Ag powder which forms the silver coloured mirror in the test tube. So this test is also known as silver mirror test. R − CHO Powder + Ag NH 3 2 + → R − COO − + Ag

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