Conditions used for the formation of ethylene glycol from ethylene are :

Bromine water

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Cold alkaline

{K M n O}_{4}

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Dilute

H_{2} {S O}_{4}, 60^{0} C

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A g / 200^{0} C

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Solution

The correct option is A Cold alkaline ${K M n O}_{4}$
alkaline $K M n O_{4}$ acts as a oxidizing agent in preparation of ethylene glycol from ethylene. The reaction can be given as follow:
$C H_{2} = C H_{2} + H_{2} O + [O] a l k a l i n e K M n O_{4} - --------- \to C H_{2} O H - C H_{2} O H$

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