Which of the following is true for liquids according to the kinetic molecular theory?
- AMolecules are far apart and move freely
- BMolecules are in contact with each other and in constant motion
- CMolecules are fixed in position and only vibrate
- DMolecules have no attractive forces between them
The resistance to flow of a liquid is called:
- ASurface tension
- BViscosity
- CVapour pressure
- DEvaporation
At constant temperature, the pressure exerted by the vapour of a liquid in equilibrium with the liquid is called:
- ABoiling point
- BVapour pressure
- CSurface tension
- DMolar heat of vaporization
The spontaneous change of a liquid into its vapour at the surface of the liquid is called:
- ACondensation
- BEvaporation
- CBoiling
- DSublimation
The temperature at which the vapour pressure of a liquid becomes equal to the external pressure is called:
- AMelting point
- BBoiling point
- CCritical point
- DFreezing point
Which of the following properties of water is due to strong hydrogen bonding?
- ALow surface tension
- BHigh vapour pressure
- CHigh boiling point
- DLow heat of vaporization
The amount of heat required to convert one mole of a solid into its liquid state at its melting point is called:
- AMolar heat of vaporization
- BMolar heat of fusion
- CEnthalpy of solution
- DLattice energy
In which state of matter are the particles most disordered?
- ASolid
- BLiquid
- CGas
- DLiquid crystal
Which of the following is a characteristic of crystalline solids?
- ANo definite geometric shape
- BSharp melting point
- CNo cleavage planes
- DRandom arrangement of particles
According to kinetic molecular theory, the average kinetic energy of gas molecules is:
- AEqual to the intermolecular forces
- BGreater than the average energy of attraction
- CLess than the average energy of attraction
- DIndependent of temperature
