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Explain Tollen's reagent test . |
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Answer» SOLUTION :Tollen's reagent is a silver ammonia complex. `[Ag(NH_(3))_(2)](+) OH^(-)` (2) When an aldehyde, like acetaldehyde is heated with Tollen's reagent, it is oxidised to acetic acid and silver ions ` Ag^(+)` in Tollen's reagent complex are reduced to silver (Ag) giving greyish black precipitate or deposition of silver on innter suface of the test tube which shines like a mirror. Hence this test is also called silver mirror test.  (3) This test is not given by ketones. (4)Hence Tollen's reagentis used to distinguish between ALDEHYDES and ketones. |
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