Water

Water has a high specific heat capacity. This property is primarily due to:

• The hydrogen bonding between water molecules.

• The ionic bonding in water.

• The low molecular weight of water.

• The presence of dissolved salts.

Which property of water allows it to travel up thin tubes against gravity in plants?

• High specific heat capacity

• Cohesion and adhesion

• High surface tension

• Low vapor pressure

What is the critical point of water?

• The temperature and pressure at which water coexists as a solid, liquid, and gas.

• The temperature and pressure above which water cannot exist as a liquid, regardless of the pressure.

• The point at which water's density is at its maximum.

• The point at which water reaches its maximum boiling point.

Which of the following best describes why sweating cools the body?

• Sweat absorbs body heat when it condenses.

• The evaporation of sweat requires heat energy, which is taken from the body, cooling it.

• Sweat forms a barrier on the skin that blocks heat from entering the body.

• Sweat increases the body's surface area, allowing more heat to escape.

Why is water considered a universal solvent?

• It can dissolve nonpolar substances easily.

• Its polarity allows it to dissolve a wide range of polar and ionic substances.

• It reacts with most substances, breaking them down.

• It has a low specific heat capacity.

What is the main reason for water's high boiling point compared to other similar-sized molecules?

• Its high molecular weight.

• Strong covalent bonds within the water molecule.

• Extensive hydrogen bonding between water molecules.

• The presence of ionic bonds in water.

Which property of water is crucial for maintaining temperature stability in living organisms?

• High surface tension

• High specific heat capacity

• High vapor pressure

• High viscosity

In which process does water act as a reactant?

• Condensation reactions

• Hydrolysis reactions

• Evaporation

• Sublimation

Which of the following best explains the high surface tension of water?

• Water molecules have strong ionic bonds.

• Water molecules form hydrogen bonds at the surface, creating a "skin."

• Water molecules repel each other at the surface.

• Water molecules form covalent bonds at the surface.

Why is water essential for enzyme activity?

• Water increases the temperature, enhancing enzyme activity.

• Water provides a medium for substrates and enzymes to interact.

• Water is a product of enzyme reactions.

• Water denatures enzymes, making them more active.