Hydrogen Bonds

What is a hydrogen bond?

• A bond between two hydrogen atoms and an electronegative atom

• A covalent bond involving hydrogen and an electronegative atom

• A weak attraction between a hydrogen atom and an electronegative atom

• A type of ionic bond and an electronegative atom

Which of the following molecules can form hydrogen bonds?

• CH₄

• H₂

• NH₃

• CO₂

Hydrogen bonding occurs when hydrogen is bonded to which of the following elements?

• Sulfur, Carbon, Phosphorus

• Nitrogen, Oxygen, Fluorine

• Potassium, Sodium, Calcium

• Hydrogen, Helium, Neon

Why is the boiling point of water (H₂O) higher than that of hydrogen sulfide (H₂S)?

• Water is more acidic

• Water has a higher molecular mass

• Water has more electrons

• Water forms hydrogen bonds

Which property of water is a direct result of hydrogen bonding?

• High surface tension

• High density

• Low specific heat capacity

• Low boiling point

Hydrogen bonds occur when hydrogen is bonded to highly ____ atoms like nitrogen, oxygen, or fluorine.

• electronegative

• electropositive

• tendency

• attraction

In water, each molecule can form hydrogen bonds with up to ____ other water molecules.

• one

• two

• three

• four

Hydrogen bonding is a type of ____ intermolecular force.

• weak

• strong

• low

• high

The presence of hydrogen bonds in water causes it to have a relatively high ____ point.

• evaporation

• cooling

• boiling

• heating

A hydrogen bond is ____ than a covalent bond but ____ than van der Waals forces.

• weaker, stronger

• weaker, weaker

• stronger, weaker

• stronger, stronger