Decolorization of KMnO4 solution takes place when it reacts with ethene. The final product of this reaction which is used as an anti-freeze is:
Answer & explanation
Correct answer: option 1
The correct answer is option 1. Ethylene glycol.
The decolorization of potassium permanganate (KMnO₄) solution when it reacts with ethene (ethylene) results in the formation of ethylene glycol. KMnO₄ is a strong oxidizing agent and reacts with alkenes to form diols (compounds with two hydroxyl groups).
Here is the reaction:
In this reaction, ethene (CH₂=CH₂) reacts with KMnO₄ in the presence of water to form ethylene glycol (HOCH₂CH₂OH). Ethylene glycol is commonly used as an antifreeze in cooling and heating systems.
Therefore, the final product of this reaction, which is used as an antifreeze, is: Ethylene glycol.
Hydroxylation of ethene takes place in the presence of cold KMnO4 to form Ethylene glycol.