IMFA

Which of the following is NOT correct about intermolecular forces?

• It is the force between two or more molecules

• It is the force between two or more atoms in a molecule

• It is responsible for the properties of substances

• It explains why a substance is solid, liquid or gas in room temperature.

What BEST describes a hydrogen bond?

• H is bonded to nitrogen, oxygen, and fluorine.

• All molecules that contains hydrogen

• It has van der Waals force

• It has weak attractive forces between atoms and molecules

All of the following have van der Waals force EXCEPT

• Dipole-dipole

• London force

• Dispersion force

• Hydrogen bond

Which London Dispersion force is induced when a non-polar molecule becomes a dipole because of an approach of an ion?

• Ion-induced dipole

• Dipole-induced dipole

• Hydrogen-induced dipole

• None of the choices

It is defined as the fluid's resistance to flow.

• Boiling point

• Surface tension

• Solubility

• Viscosity

Melting point is the temperature at which a

• solid turns liquid

• liquid turns gas

• gas turns solid

• liquid turns solid

How would you describe the surface tension of a molecule having a weak IMFA?

• average surface tension

• higher surface tension

• lower surface tension

• cannot be determined

Compounds with strong IMFA are usually (blank) at room temperature.

• solid or liquid

• solid

• liquid

• gas

Between HF and HBr, which will have a stronger IMFA?

• HF

• HBr

• H₂O

• Cannot be determined

Among the choices, which of the following will have the weakest IMFA?

• H₂O

• NaCl

• CH₄

• HCl