On heating an aldehyde with Fehling's reagent, a reddish brown precipitate is obtained due to the formation of

Question

On heating an aldehyde with Fehling's reagent, a reddish brown precipitate is obtained due to the formation of (A)  RCOO-  (B)  CuO  (C)  Cu2O  (D)  RCH2OH

Tardigrade Admin · Accepted Answer

When an aliphatic aldehyde is heated with Fehling's solution, the latter is reduced to give a red ppt. of cuprous oxide. During this reduction, the following reactions occu

Aldehyde RC H O + Fehling’s solution 2 C U^{2 +} + 5 O H^{-} \to Carboxylate ion RCO O^{-} + Cuprous oxide (Red ppt) C u_{2} O ↓ 3 H_{2} O

Q. On heating an aldehyde with Fehling's reagent, a reddish brown precipitate is obtained due to the formation of

$RCO O^{-}$

$C u O$

$C u_{2} O$

$RC H_{2} O H$

Q. On heating an aldehyde with Fehling's reagent, a reddish brown precipitate is obtained due to the formation of

RCOO−

CuO

Cu2​O

RCH2​OH

When an aliphatic aldehyde is heated with Fehling's solution, the latter is reduced to give a red ppt. of cuprous oxide. During this reduction, the following reactions occu AldehydeRCHO​+Fehling’s solution2CU2+​+5OH−→Carboxylate ionRCOO−​+Cuprous oxide (Red ppt)Cu2​O↓3H2​O​

$RCO O^{-}$

$C u O$

$C u_{2} O$

$RC H_{2} O H$