Topic 1.1: Water Questions

Distinguish between a solvent and a solute, using water and salt as examples.

Which symbol marks the partial charge found on the oxygen atom of a water molecule?

Outline what is meant by a hydrogen bond between two water molecules.

On a hot afternoon the air above a lake is much warmer than the lake water, even though both received the same sunlight. Which property of water best explains this?

Inside a very narrow xylem vessel, water molecules cling to and climb the vessel walls. This is an example of which property of water?

What type of bonding holds the atoms together within a single water molecule?

Which process inside an organism depends directly on water acting as a solvent?

Distinguish between cohesion and adhesion in water.

State the type of bond that joins the oxygen atom to each hydrogen atom within a water molecule.

The diagram shows two water molecules. In the diagram, the dashed line labelled X joins a hydrogen of the left molecule to the oxygen of the right molecule. What does the dashed line X represent? [Diagram: bio-hydrogen-bonding {"showCharges":true,"showThird":false}]

A pond skater rests on the surface of a still pond without breaking through. Which property of water is mainly responsible for supporting the insect?

Which of these substances would dissolve LEAST well in water?

A whale lives in cold polar water, which draws heat away from its body very quickly. Which feature is an adaptation to the thermal property of water responsible for this rapid heat loss?

A dog cools itself by panting, evaporating water from its tongue and airways. Which property of water makes this an effective way to lose heat?

A hydrogen bond between two water molecules is an attraction between which two parts?

A molecule is described as hydrophobic. What does this tell you about how it behaves in water?

Water is pulled up the xylem of a tall tree as an unbroken column from roots to leaves. Which property keeps the water column unbroken so the pull can be transmitted to the bottom?

Why is a whole water molecule described as polar?

A single hydrogen bond between two water molecules is very weak and easily broken. Why, then, do hydrogen bonds give water such distinctive properties?

Which statement correctly distinguishes cohesion from adhesion?