Chapter 2 Review

The property of water that allows a paperclip to float on top of it

• adhesion

• capillary action

• high heat capacity

• surface tension

How does capillary action happen?

• water is polar
• it drags other water molecules up the tubes
• it sticks to the tubes
• ALL OF THESE REASONS

Refer to the picture of water sticking to a leaf; this is occurring because of:

• Adhesion

• Cohesion

What kind of bonds are responsible for the unique cohesion, surface tension, and adhesion properties of water molecules?

• hydrophobic bonding

• ionic bonding

• hydrogen bonding

• polar covalent bonding

Which of the following properties of water is responsible for the formation of raindrops?

• Cohesion

• Adhesion

• high thermal energy

• high kinetic energy

What is the chemical symbol of water?

• H2O

• CO2

• O2

• N2

 Small insects can walk across the surface of calm water. Their feet push the surface of the water down slightly, somewhat like a person walking across a trampoline, but they do not break the surface. What is the best explanation for why this happens?

• The insects are light enough so that they do not break the hydrogen bonds holding the water molecules together
• The insects actually use their wings to hover slightly above the water's surface and they only skim it with their feet
• The insects' feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water's surface
• The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next

This individual is ice fishing. They cut through the top layers of ice to reach the water and fish below. What property of water allows for this to happen?

• Expansion Upon Freezing

• Universal Solvent

• Ability to Moderate Temperature

• Cohesive Behavior

What property of water allows water to flow against gravity?

• Polarity

• Cohesion

• Capillary Action

• Adhesion

What kind of bond is formed between the two hydrogen atoms and the single oxygen atom?

• hydrogen bonds

• covalent bonds

• ionic bonds

• disulphide bonds