Question

The boiling point of water is exceptionally high because

• A. there is a covalent bond between H and O.
• B. water molecule is linear.
• C. water molecules associate due to hydrogen bonding.
• D. water molecule is not linear.

Answer 1

Answer: (C)

water molecules associate due to hydrogen bonding.

Answer 2

Boiling point of water is exceptionally high because
water molecules associate due to hydrogen bonding.
The hydrogen bond in liquid water, leaving the molecules essentially in the same position, requires only about $25\%$ of this energy.