But-2-ene on reaction with alkaline $K M n O_{4}$ at elevated temperature followed by acidification will give:

2 molecules of

C H_{3} C H O

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one molecule of

C H_{3} C H O

and one molecule of

C H_{3} C O O H

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2 molecules of

C H_{3} C O O H

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Solution

The correct option is D 2 molecules of $C H_{3} C O O H$
Alkene is oxidised to carboxlic acids when heated with alkaline $K M n O_{4}$ followed by acidification.
Since, but-2-ene is a symmetrical alkene, it form 2 molecule of same carbocylic acid.

Hence, option (c) is correct.

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