How many of the following will give silver mirror test or white ppt. with Tollens reagent?
(1) Glucose
(2) Fructose
(3) Both 1 and 2
(4) Methane

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answer is 3.

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Detailed Solution

Glucose and fructose, both give silver mirror test with Tollen's reagent. This test used to distinguish between an aldehyde and a ketone (as it only reacts with an aldehyde). Tollen's reagent, which is a colorless, basic and aqueous solution, containing silver ions coordinated to ammonia [Ag(NH₃)₂]⁺.

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