quiz 1

Substances like heavy syrup and molasses flow slowly than water. The ability of these substances to resist flow is known as

• Capillary Action

• Pressure

• Viscosity

• Surface Tension

The ability of water molecules to move against gravity

• capillary action

• surface tension

• temperature

• viscosity

This happens when the vapour pressure of a liquid becomes equal to the atmospheric pressure

• melting

• freezing

• condensing

• boiling

The pressure exerted by the vapor from the evaporation of a liquid or solid above a sample of the liquid or solid in a closed container

• surface tension

• capillary action

• vapour pressure

• boiling point

When intermolecular forces are high, the boiling point is expected to be

• dependent on the number of atoms.

• . dependent on the kinds of atoms.

• low

• high

It is the ability to stick with water molecule itself

(a)  

It is the ability of a substance to dissolve in a given substance

(a)  

It is the capacity to stick with another substance/surface

(a)  

Which is more viscous between glycerol and water based on their LEDS and intermolecular forces?

• 
• 

Answer explanation

Glycerol has 3 OH groups that can participate in Hydrogen bonding whereas water has only one OH group to form hydrogen bonding. It means that Glycerol is more viscous than water

Which is true of vapour pressure?

• It is affected by the surface area of the liquid or solid.

• Vapour pressure is higher when the temperature of the molecule is low.

• Molecules with high molar heat of vaporization has low vapour pressure.

• When vapour pressure is lower than atmospheric pressure, boiling occurs.