Which one of the following is also called the silver mirror test?
Correct answer: C. Tollen's reagent
- A. Fehling's solution test
- B. Iodoform test
- C. Tollen's reagent
- D. Benedict's solution test
Explanation
Tollens' reagent is a chemical reagent used to determine the presence of an aldehyde, aromatic aldehyde and alpha-hydroxy ketone functional groups. The reagent consists of a solution of silver nitrate and ammonia. If these functional groups are present you will observe a silver mirror.Fehling's solution tests used to detect the presence of reducing sugars, such as aldehydes or ketones,The iodoform test is used to identify the presence of a methyl ketone, such as acetone, and it involves the formation of a yellow precipitate of iodoform (CHI3).The test that is also called the "silver mirror test" is the Tollen's reagent test.In the Tollen's reagent test, a substance (usually an aldehyde) is mixed with Tollen's reagent, which consists of a solution of silver nitrate (AgNO3) in aqueous ammonia (NH3). The aldehyde reduces the silver ions in Tollen's reagent, resulting in the formation of a silver mirror on the inner surface of the test tube or container. This silver mirror appearance is the basis for the name "silver mirror test."Benedicts solution tests used to detect the presence of reducing sugars, such as aldehydes or ketones.
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About Aldehydes and Ketones
Aldehydes and ketones contain the polar carbonyl group, but aldehydes are generally more readily oxidised and more reactive than ketones. Coverage includes preparation by oxidation or reduction routes, nucleophilic addition of reagents such as hydrogen cyanide and bisulfite, and tests that distinguish aldehydes from ketones.
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