Four compounds A, B, C and D were heated individually with Tollen’s reagent. It was found that all compounds other than D formed a silver mirror on the inside of their test tubes. Identify the compound D.
A
Acetaldehyde
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B
Butyraldehye
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C
Acetone
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D
Benzaldehyde
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Solution
The correct option is C Acetone When aldehydes are heated with ammoniacal silver nitrate solution (Tollen’s reagent), it reduces the silver ions to metallic silver and forms a silver mirror. Ketones do not give this test as they are different to oxidise.