Question

which organic acid gives silver mirror test​

Answer 1

Answer:

Tollen's reagent is an alkaline solution containing a silver–ammonia complex, [Ag(NH3)2]OH or ammoniacal silver nitrate, AgNO3 + NH4OH. It is a mild oxidising agent (itself gets reduced from Ag+ into Ag). Tollen's test is also called “silver mirror test” due to the formation of white ppt of elemental silver.

Answer 2

This is an incomplete question, here is a complete question.

Which organic acid gives silver mirror test​?

(a) Formic acid

(b) CH₃COCHOHCH₃

(c) Tartaric acid

(d) Glucose

The organic acid gives silver mirror test​ are, formic acid, CH₃COCHOHCH₃, Tartaric acid and glucose.

Explanation :

Silver mirror test :

The Tollen's reagent is used in silver mirror text. Tollen's reagent is an ammonical silver nitrate solution which is heated with an aldehyde oxidizes it to carboxylic acid and itself gets reduced to silver.

The general reaction will be:

$CH_3CHO+2Ag(NH_3)_2^++3OH^-\rightarrow CH_3COO^-+2Ag(ppt.)+4NH_3+2H_2O$

Tollen's reagent oxidizes aldehyde, $\alpha$-hydroxy ketone, formic acid.

This test is not given by ketones

Thus, the organic acid gives silver mirror test​ are, formic acid, CH₃COCHOHCH₃, Tartaric acid and glucose.

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