Hydrocarbons - Result Question 1
2. But-2-ene on reaction with alkaline $\mathrm{KMnO}_4$ at elevated temperature followed by acidification will give
(2019 Main, 12 April I)
(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 $\mathrm{CH}_3 \mathrm{CHO}$
Show Answer
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 :
BETA
