Explain the reaction when-
a) Ethyne is bubbled through alkaline dilute solution of KMnO4.
b) Propan-2-ol is heated with alumina at 630K.

Dear User,
(a) Alkynes on treatment with alkaline KMnO4 undergo oxidative cleavage at triple bond to form carboxylic acids. However, ethyne undergoes oxidation to give oxalic acid when treated with ​ alkaline KMnO4 . The reaction is shown below :

(b)Propan-2-ol undergoes dehydration when treated with alumina at 630 K and alkene i.e. Prop-1-ene will be obtained. 

 

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