MEDIUMMCQ SINGLEJEE Mains ChemistryInorganic ChemistryCarboxylic Acids and DerivativesPreparation of Carboxylic Acid Derivatives
Formic acid can reduce
A.Tollen’s reagent
B.Mercuric chloride✓ Correct
C.Fehling reagent
D.All of these
Explanation
Tollen’s reagent- 2 2 2 ( mirror) 2 silver HCOOH Ag O CO H O Ag -> Fehling reagent- 2 2 2 ppt 2 red HCOOH CuO CO H O Cu O -> Mercury chloride- 2 2 ( ) 2 2 2 4 2 black HCOOH HgCl CO HCl Hg -> 149. Which acid derivative on hydrolysis will give brown precipitate with Nessler’s reagent? (a) Acid anhydride (b) Acid amide (c) Acid chloride (d) All of these Nessler’s reagent is the alkaline solution of potassium tetraiodomercurate (II) and its chemical formula is 2 4 K HgI . It can be obtained by the reaction of mercuric iodide with excess potassium iodide. Carboxylic Acid and It
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