Types of interparticle interactions

Question 1

What are the intermolecular forces present is in formaldehyde, CH2O?

Answer 1

London and Dipole-dipole forces

All molecules have London dispersion forces.
Dipole-dipole because there is a polar covent bond between carbon and oxygen.

Question 2

What is the predominant intermolecular forces present in ethanol, C2H5OH?

Answer 2

Hydrogen bonding

Ethanol has an -O-H group in its structure. -O-H can undergo hydrogen bonding.

Question 3

What are the intermolecular forces present is in methane, CH4?

Answer 3

London dispersion forces only

Methane is a nonpolar molecule, meaning it has no permanent dipole moment. So it can only exhibit London dispersion forces.

Question 4

What intermolecular interaction is defined as a weak interaction between a polar molecule and a nonpolar molecule?

Answer 4

Dipole-induced dipole attractive forces

A weak attraction known as “dipole-induced dipole attractive forces” happens when a polar molecule disrupts the electron configuration in a nonpolar species, such as an atom, to create a dipole.

Question 5

What is the predominant intermolecular forces present in a solution of NaBr and water, H2O?

Answer 5

Ion-dipole forces

Ion-dipole forces happens when an ionic compound (NaBr) is mixed with a polar compound (H2O).