Properties of Water Worksheet

What is the molecular formula of water?

• H2O

• CO2

• O2

• H2SO4

Which property of water allows it to act as a temperature buffer in cells?

• Its ability to dissolve gases

• Its high specific heat capacity

• Its colorless nature

• Its density

Why does oxygen in a water molecule become slightly negative (δ-)?

• It loses electrons to hydrogen

• It has a lower electronegativity than hydrogen

• It attracts electrons more strongly than hydrogen

• It shares electrons equally with hydrogen

What type of bond is shown forming between water molecules in the diagram?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Metallic bond

Explain how the polarity of water molecules affects their interactions with each other and with other substances. Use evidence from the text to support your answer.

• Polarity causes water molecules to repel each other and prevents hydrogen bonding.

• Polarity allows water molecules to form hydrogen bonds, enabling them to dissolve many substances and interact with each other.

• Polarity makes water molecules non-reactive and unable to dissolve solutes.

• Polarity only affects the color of water, not its interactions.

Which property allows water to dissolve charged and polar substances, making it known as the "universal solvent"?

• Cohesive property

• Solvent property

• Thermal property

• Physical property

What term describes substances that do not dissolve in water, such as lipids?

• Hydrophilic

• Hydration shells

• Hydrophobic

• Solvent

Why are the cohesive properties of water biologically significant?

• They allow water to dissolve more substances.

• They contribute to water’s high surface tension, enabling small insects to glide on water.

• They increase water’s boiling point.

• They make water a good conductor of electricity.

How do the polar regions of a water molecule interact with other molecules to form hydration shells?

• By forming covalent bonds with non-polar molecules

• By associating with molecules that have the same charge

• By associating with molecular surfaces that have an opposing charge

• By repelling all charged molecules

A scientist wants to transport dissolved nutrients in a vascular plant. Which structure is responsible for this function?

• Blood plasma

• Hydration shell

• Xylem vessel

• Phloem