Hydrocarbons 2 Question 2
2. But-2-ene on reaction with alkaline $\mathrm{KMnO}_{4}$ at elevated temperature followed by acidification will give
(2019 Main, 12 April I)
(a)
(b) one molecule of $\mathrm{CH}{3} \mathrm{CHO}$ and one molecule of $\mathrm{CH}{3} \mathrm{COOH}$
(c) 2 molecules of $\mathrm{CH}_{3} \mathrm{COOH}$
(d) 2 molecules of $\mathrm{CH}_{3} \mathrm{CHO}$
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Answer:
Correct Answer: 2. (c)
Solution:
- But-2-ene on reaction with alkaline $\mathrm{KMnO}{4}$ at elevated temperature followed by acidification will give acetic acid $\left(\mathrm{CH}{3} \mathrm{COOH}\right)$. Hot alkaline solution of potassium permanganate followed by acidification oxidatively cleaved alkenes. The reaction proceed as follows :
