Water & Bonds 4.1

What property of water allows it to dissolve many substances?

• High specific heat

• Surface tension

• Universal solvent

• Low vapor pressure

Which type of bond is formed when two hydrogen atoms share electrons with one oxygen atom to create a water molecule?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Metallic bond

What is the primary reason water has a high boiling point relative to other molecules of similar size?

• Ionic bonding

• Covalent bonding

• Hydrogen bonding

• Van der Waals forces

In a covalent bond, what happens to the electrons?

• They are transferred from one atom to another.

• They are shared between atoms.

• They are completely removed.

• They orbit the nucleus at higher energy levels.

Which of the following is NOT a property of hydrogen bonds?

• They are stronger than covalent bonds.

• They are directional.

• They are weaker than ionic and covalent bonds.

• They contribute to the high boiling point of water.

Why does ice float on water?

• Ice has a higher density than water.

• Ice has a lower density than water.

• The hydrogen bonds in ice are shorter.

• The hydrogen bonds in ice are longer.

What is the significance of water's high heat of vaporization?

• It indicates that water can absorb a lot of heat before it begins to evaporate.

• It means water evaporates quickly.

• It suggests that water is a poor coolant.

• It shows that water has a low specific heat.

What role do hydrogen bonds play in DNA structure?

• They form the backbone of the DNA molecule.

• They connect the DNA base pairs together.

• They are responsible for having two copies of each chromosome.

• They add covalent pressure to the DNA structure.

Is water a polar or nonpolar molecule?

• Polar

• Nonpolar

Which of the following atoms is the most electronegative (polar)?

• Carbon

• Hydrogen

• Oxygen