Question

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 1

Answer: (C)

oxidation by heating with copper followed by reaction with Fehling solution

Answer 2

(a)$CH_{3}CH_{2} CH_{2}OH$ ${ ->[{alk. KMnO_{4}}][{or\, K_{2}Cr_{2}O_{7} /H+}] }$ $CH_{3}CH_{2}CHO$
$\rightarrow CH_{3}CH_{2}COOH$ ${ ->[Fehling \, sol.] }$ No reaction
$\left(b\right) CH_{3}CHOHCH_{3}$ ${ ->[{alk. \, KMnO_{4}}][{or\, K_{2}Cr_{2}O_{7} / H+}] }$ $CH_{3}COCH_{3}$
$\to CH_{3}COOH$ ${ ->[Feh \, sol.] }$ No reaction
$\left(C\right)CH_{3}CH_{2}CH_{2}OH$ ${ ->[Cu] }$ $CH_{3}CH_{2}CHO$ ${ ->[{Fehling}][{Solution}] }$ $Cu_{2}O ?\quad_{\left(red\right)}$
$CH_{3}CHOHCH_{3}$ ${ ->[Cu] }$ $CH_{3}COCH_{3}$ ${ ->[{Fehling}][{Solution}] }$ No reaction
$\left(d\right) CH_{3} CH_{2}CH_{2}OH or\,$ $CH_{3} CHOHCH_{3}$ ${ ->[ Conc.\, H_{2}SO_{4}] }$ $CH_{3} CH=CH_{2}$