Water Properties Quiz

Why is water known as the universal solvent?

• It can dissolve more substances than any other liquid.

• It is found everywhere on Earth.

• It can dissolve gases and solids equally well.

• It is the most abundant liquid on Earth.

At what temperature is water's density the highest?

• 0°C

• 4°C

• 100°C

• -4°C

What property of water allows it to act as a good solvent?

• Its high specific heat

• Its polarity

• Its density

• Its colorlessness

What is the salinity of seawater typically measured in?

• Percent (%)

• Milligrams per liter (mg/L)

• Parts per thousand (ppt)

• Molarity (M)

What happens to the density of water when it freezes?

• It increases.

• It decreases.

• It remains the same.

• It first increases, then decreases.

Which of the following is a result of water's high polarity?

• It has a low boiling point.

• It is a poor solvent for ionic compounds.

• It has a high surface tension.

• It is colorless.

What unit is commonly used to express the salinity of freshwater?

• Parts per million (ppm)

• Percent (%)

• Parts per thousand (ppt)

• Molarity (M)

How does the salinity of water affect its density?

• Higher salinity decreases water's density.

• Higher salinity increases water's density.

• Salinity has no effect on water's density.

• Higher salinity first increases, then decreases water's density.

Why is water less dense as a solid than as a liquid?

• The molecular structure of ice is more ordered, creating more space between molecules.

• The molecular structure of ice is less ordered, creating less space between molecules.

• Ice absorbs heat when freezing, causing expansion.

• Ice releases heat when freezing, causing contraction.

What effect does the polarity of water have on its boiling point?

• It increases the boiling point.

• It decreases the boiling point.

• It has no effect on the boiling point.

• It first decreases, then increases the boiling point.