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How would you obtain ethan-1,2-diol from...

How would you obtain ethan-1,2-diol from ethanol?

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`underset("Ethanol")underset(CH_(2)OH)overset(CH_(3))(|)underset(443-443K)overset("Conc."H_(2)SO_(4))(to)underset("Ethylene")underset(CH_(2))overset(CH_(2))(||)overset("Cold dil." KMnO_(4))(to)underset("ethan-1,2-diol")underset(CH_(2)OH)overset(CH_(2)OH)(|)`
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