The favorable conditions for the hydration of alkenes are

low water concentration and high temperature

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low water concentration and low temperature

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high water concentration and high temperature

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high water concentration and low temperature

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Solution

The correct option is D
high water concentration and low temperature

Hydration of alkenes to form alcohols and dehydration of alcohols to form alkenes are reversible.

Low $H_{2} O$ concentration and high temperature favour alkene formation because the volatile alkene distills out of the reaction mixture and shifts the equilibrium toward alkene. On the other hand, hydration of alkenes occurs at low temperature and with dil. acid which provides a high concentration of $H_{2} O$ as reactant.

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