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Question

Which term best describes why a low molecular weight compound could have an unusually high melting point, high boiling point and low vapor pressure?

A
Dipole-dipole attraction
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B
Hydrogen bonding
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C
Van der Waals forces
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D
Covalent bond
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Solution

The correct option is C Hydrogen bonding
Due to hydrogen bonding, low molecular weight compounds could have high melting point, high boiling point and low vapor pressure.Due to high intermolecular H bonding it becomes tough for a molecule to break and due to this they cannot escape easily, thereby having high melting point, high boiling point and low vapor pressure.

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