Intermolecular Forces and Polarity Quiz

What is the key characteristic of a nonpolar molecule?

• Different surrounding atoms

• Unequal distribution of charge

• Presence of lone pairs

• Equal distribution of charge

Which of the following molecules is nonpolar?

• NH3

• HCl

• CO2

• H2O

What makes a molecule polar?

• Same surrounding atoms

• Symmetrical shape

• Presence of lone pairs or different surrounding atoms

• Equal distribution of charge

Which of the following is true about electrostatic forces?

• They are present in covalent compounds

• They are weaker than hydrogen bonds

• They are a type of intermolecular force

• They occur between positive and negative charges in ionic compounds

Hydrogen bonding occurs when hydrogen is bonded to which of the following atoms?

• Carbon

• Sulfur

• Phosphorus

• Nitrogen

What is the main reason hydrogen bonds are strong?

• Hydrogen has a full positive charge

• There is a large electronegativity difference

• Hydrogen bonds are actual bonds

• Hydrogen is bonded to a less electronegative atom

What is a dipole-dipole interaction?

• A force between nonpolar molecules

• A force between polar molecules

• A temporary induced dipole

• A type of covalent bond

Which intermolecular force is the weakest?

• Dipole-dipole interactions

• Hydrogen bonding

• London dispersion forces

• Electrostatic forces

What causes London dispersion forces?

• Permanent dipoles

• Electrostatic attraction

• Hydrogen bonding

• Temporary induced dipoles

Why do London dispersion forces result in low melting and boiling points?

• They are temporary and weak

• They involve permanent dipoles

• They occur only in polar molecules

• They are strong and long-lasting