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Practice mode Aldehydes and Ketones

What is the active species in Tollens’ reagent?

Correct answer D. [Ag(NH₃)₂]⁺

Explanation

Tollens' reagent is ammoniacal silver nitrate containing the diamminesilver(I) ion. Aldehydes reduce it to metallic silver, which coats the tube as a silver mirror, while ketones give no reaction.

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