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Directive Influence of Substituents

Four compound...

Question

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.

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Directive Influence of Substituents

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