Water and its properties

the dotted line between water molecules in the diagram represent ?

• ice crystals

• hydrogen bonds

• electrical charges

• ionic bonds

Which properties of water molecules could be said to result from hydrogen bonding?

• It adheres to surfaces well, and it has a very low specific heat capacity.

• It is an excellent solvent, and has high cohesiveness

• It is fluid as a liquid or a gas, and it is colourless

• It is transparent and light

Water exists in the form of polar molecules.

What is the term used to describe non-polar molecules which don't interact with water molecules?

• Hydrophilic

• hydrophilic

• hydrostatic

• osmotic

Which characteristics of fats links to the reason why they are not transported in large quantities in the blood?

• They are hydrophobic and insoluble in water

• They are hydrophilic and insoluble in water

• They are hydrophilic and soluble in water

• They are hydrophilic and insoluble in water

Which of the following points can be explained by the capillary action properties of water?

• A. water is attracted to the walls of the xylem vessels

• B. Water striders are able to walk on water

• C. Water molecules move up the plant as a continuous stream without breaking

• D. Water molecules are able to raise through small pores of soil

Which property of water makes it more useful as a coolant in sweating?

• It it adhesive and cohesive.

• It has a high latent heat of vaporisation

• It is transparent.

• It has a high melting point.

The table below shows some of the properties of water and methane.

For what reason is the melting point (m.p.) of water so much higher than the m.p. of methane?

• The size of a water molecule is smaller than a methane molecule.

• Hydrogen bonding in the methane helps to lower the melting point.

• Hydrogen bonding in the water holds the molecules more closely together.

• Water is a liquid and methane is a gas.

Which of the following points can be explained by the solvent properties of water?

• A. Glucose is transported in the blood plasma, which is mostly water.

• B. Water makes a good coolant in sweat.

• C. Water only changes temperature slowly, so the oceans remain at a fairly constant temperature.

• D. Lipids are transported in the blood plasma which is mostly water.

Which of the following points can be explained by the surface tension properties of water?

• A. water is attracted to the walls of the xylem vessels

• B. Water striders are able to walk on water bodies

• C. Water molecules move up the plant as a continuous stream without breaking

• D. Water molecules are able to raise through small pores of soil

the property of water shown in the picture is?

• capillary action

• surfaces tension

• hydrogen bonding

• polarity