Which has the smallest vapour pressure at 25°C
SiO2 CO2 H2O Which has the highest normal boiling point NH3 CH4 H2O Which has the least viscosity CH3CH2OH HOCH2CH2OH HOCH2CH2OH Which has the greatest heat of vaporization H2Te H2Se
1) SiO2 has the smallest vapour pressure (Because this is a solid)
2) Normal boiling point of NH3 : -21.08 F
Normal boiling point of CH4 : -258.7 F
Normal boiling point of H20 : 212 F
So Water(H20) has the highest normal boiling point
3) Viscosity of CH3CH2OH is least than the Viscosity of HOCH2CH2OH, because CH3CH2OH has less number of OH bonds compared with HOCH2CH2OH. More numver of OH bonds, the more the viscosity
4) H2O has the greatest heat of vaporization
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