Liquids and Solids Set 3

Results

#1. Trend of boiling points of halogens from fluorine to iodine is that it.

decreases

increases

remains constant

negligible

#2. Molecules of hydro carbons with large chain lengths experience

repulsive forces

strong attractive force

weaker attractive forces

no attractive force

#3. Hydrocarbons which generally have high molecular masses exist is.

solid form

liquid form

vapour form

gaseous form

#4. Exceptionally low acidic strength of HF is due to

strong polar bond

small size of fluorine

strong hydrogen bonding

Vander Waal’s forces

#5. Long chain of amino acids are coiled about one another into spiral by.

covalent bond

ionic bond

hydrogen bond

Vander Waal’s forces

#6. Evaporation of water is possible at

100oC

0oC

at all temperatures

above 100oC

#7. Boiling point is low for liquid with

high vapour pressure at given temperature

low vapour pressure at a given temperature

very high vapour pressure

very low vapour pressure

#8. At equilibrium rate of evaporation and rate of condensation

become very high

become very low

can never be equal

become equal

#9. In an open system vapour pressure of water at 100oC at sea level is

700 mm of Hg

760 mm of Hg

670 mm of Hg

1000 mm of Hg

#10. Molar heat of vaporization of water is

140.6 kJ/mol

14.06 kJ/mol

18 kJ/mol

40.6 kJ/mol

Finish