Properties of Water

The diagram shows water molecules. Which property of water is NOT illustrated?

• Cohesion

• Polarity

• Hydrogen Bonding

• Adhesion

What is the benefit to living organisms that water has a high specific heat capacity?

• Heat can be lost from the skin when sweat evaporates.

• Aquatic environments do not have a great fluctuation in their temperature.

• The amount of heatstored by water is highly predictable.

• It allows water to be a solvent for chemical reactions at body temperature.

What is the term for the attraction of water molecules to other water molecules?

• Surface tension

• Capillary action

• Cohesion

• Adhesion

What property of water accounts for its usefulness as a coolant in sweat?

• High specific heat capacity

• High latent heat of vaporization

• High boiling point

• High melting point

What is a property of water?

• Water has a low specific heat capacity so large increases in heat energy cause a small temperature change.

• Water is an excellent solvent for non-polar substances

• Covalent bonds between adjacent water molecules are responsible for its unique properties.

• Water molecules are highly cohesive which is important for transport in xylem.

Which substance must be transported in the blood by lipoprotein complexes?

• Cholesterol

• Oxygen

• Sodium chloride

• Amino acids

Where do hydrogen bonds form?

• Between the slight negative charge of hydrogen and slight positive charge of oxygen within a water molecule.

• Between the slight positive charge of hydrogen and slight negative charge of oxygen within a water molecule

• Between the slight positive charge of hydrogen and slight negative charge of oxygen in different water molecules

• Between the slight negative charge of hydrogen and slight positive charge of oxygen in different water molecules

Researchers have developed a skin patch which can detect and measure very small concentrations of ions, sugars, amino acids, proteins and hormones which remain when sweat evaporates. What allows the presence of these substances in sweat?

• Cohesion

• Hydrophobic interactions

• Solvent properties

• Thermal properties

At room temperature, water is a liquid and methane is a gas. Which molecular property explains this difference?

• Higher molecular mass of water

• Dipolarity of water

• Presence of more hydrogen in methane

• Higher boiling point of methane

Which property of water accounts for its moderating effects on the Earth’s atmosphere?

• Cohesive

• Thermal

• Transparency

• Adhesive