The very high heat of vaporization of water is mainly a result of __________.

Van der Waals forces

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Covalent bonds

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Interionic attraction

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Hydrogen bonding

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Solution

The correct option is D Hydrogen bonding
The very high heat of vaporization of water is mainly a result of Hydrogen bonding. A very high quantity of heat energy is needed for evaporation. This amount of heat is called heat of vaporization. When heat is absorbed, hydrogen bonds are broken and water molecules can move freely.

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