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Manipal MET2015ChemistryAldehydes and Ketones

Which of the following pairs give positive Tollen's test?

Options

  1. AGlucose, sucrose
  2. BGlucose, fractose
  3. CHexanal, acetophenone
  4. DFractose, sucrose

Correct answer

B. Glucose, fractose

Step-by-step solution

Aldehyde and -hydroxy ketones give positive Tollen's test. Glucose has an aldehyde group and fructose is an -hydroxy ketone.

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