Discussion Forum



1)

1 -Propanol and 2-propanol can be distinguished by


A) oxidation with alkaline $KMnO_{4}$ followed by reaction with Fehling solution

B) oxidation with acidic dichromate followed by reaction with Fehling solution

C) oxidation by heating with copper followed by reaction with Fehling solution

D) oxidation with concentrated $H_{2}SO_{4}$ followed by reaction with Fehling solution

Answer:

Option C

Explanation:

(a) $CH_{3}CH_{2}CH_{2}OH\xrightarrow[{or K_{2}Cr_{2}O_{7}/H^{+}}]{alk.KMnO_{4}}CH_{3}CH_{2}CHO$

$\rightarrow CH_{3}CH_{2}COOH\xrightarrow{Fehling sol.} No Reaction$

(b) $CH_{3}CHOHCH_{3}\xrightarrow[{or K_{2}Cr_{2}O_{7}/H^{+}}]{alk.KMnO_{4}}CH_{3}COCH_{3}$

$\rightarrow CH_{3}COOH\xrightarrow{Fehling sol.} No Reaction$

(c) $CH_{3}CH_{2}CH_{2}OH\xrightarrow{Cu}CH_{3}CH_{2}CHO\xrightarrow{Fehling sol.}Cu_{2}O_{(Red)}$

$CH_{3}CHOHCH_{3}\xrightarrow{Cu}CH_{3}COCH_{3}\xrightarrow{Fehling sol.}No reaction$

(d) $CH_{3}CH_{2}CH_{2}OH$ OR

$CH_{3}CHOHCH_{3}\xrightarrow{Conc.H_{2}SO_{4}}CH_{3}CH=CH_{2}$