Bonus question: True or false 1. Intermolecular forces are weaker than covalent

Question

Bonus question: True or false 1. Intermolecular forces are weaker than covalent bonds but they are strong than ionic bonds. Answer: 2. For molecules with similar size and molar mass, those with higher polarity would have lower boiling point. Answer: 3. Ion-dipole forces exist between ionic sodium chloride and polar alcohol. Answer: 4. Dispersion forces exist between argon and oxygen. Answer: 5. Instantaneous dipoles exist in all molecules and atoms. Answer: 6. The strength of dispersion forces depends only on the molar mass but the shape effect on dispersion forces. Answer: 7. Ice has a higher density than water because ice has an ordered cagelike structure. Answer: 8. Liquids with weaker intermolecular interactions have lower viscosity. Answer: 9. Viscosity increases with increasing temperature. Answer: 10. For any molecules, the heat of vaporization is always lower than the heat of fusion because it takes more energy to make molecules to move past one another in a solid lattice. Answer: ofthe molecules have no

Explanation / Answer

1)

False

covalent bond and ionic bonds are intermolecular forces

2)

False

higher polarity implies greater dipole-dipole interaction and hence it will have higher boiling point

3)

True

NaCl is ions and alcohol is polar

4)

True

Dispersion force exist between any two molecules

only 4 parts at a time

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