Alcohols and Ethers - Result Question 17
####20. 1-propanol and 2-propanol can be best distinguished by
(a) oxidation with alkaline $KMnO _4$ followed by reaction with Fehling solution
(2001, 1M)
(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
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Answer:
Correct Answer: 20. (c)
Solution:
- 1-propanol $\xrightarrow{Cu / \Delta} CH _3-CH _2-CHO \xrightarrow[\text { solution }]{\text { Fehling }} Cu _2 O \downarrow$
2-propanol $\xrightarrow{Cu / \Delta} CH _3-\stackrel{|}{C}-CH _3 \xrightarrow[\text { solution }]{\text { Fehling }}$ No reaction
