RETAKE 2nd 9 Weeks Exam: Intermolecular Forces & Polarity

Front

What are intermolecular forces?

Back

Intermolecular forces are the forces of attraction or repulsion between neighboring particles (molecules, atoms, or ions). They play a crucial role in determining the physical properties of substances.

Front

What is polarity in molecules?

Back

Polarity refers to the distribution of electrical charge over the atoms joined by the bond. A polar molecule has a partial positive charge on one end and a partial negative charge on the other due to differences in electronegativity.

Front

What is hydrogen bonding?

Back

Hydrogen bonding is a strong type of dipole-dipole interaction that occurs when hydrogen is bonded to highly electronegative atoms like nitrogen, oxygen, or fluorine.

Front

Which molecules can exhibit hydrogen bonding?

Back

Molecules that have hydrogen atoms bonded to highly electronegative atoms (N, O, F) can exhibit hydrogen bonding.

Front

What is the significance of intermolecular forces in determining boiling and melting points?

Back

Stronger intermolecular forces result in higher boiling and melting points because more energy is required to overcome these forces.

Front

What are London dispersion forces?

Back

London dispersion forces are weak intermolecular forces that arise from temporary dipoles in molecules due to the movement of electrons.

Front

What is dipole-dipole interaction?

Back

Dipole-dipole interactions are attractive forces between the positive end of one polar molecule and the negative end of another polar molecule.

Front

How does molecular size affect boiling points in noble gases?

Back

In noble gases, larger atoms have more electrons, leading to stronger London dispersion forces, which results in higher boiling points.

Front

What type of intermolecular force is present in HF?

Back

HF exhibits hydrogen bonding due to the presence of hydrogen bonded to fluorine.

Front

What intermolecular forces are present in NH3?

Back

NH3 exhibits hydrogen bonding due to the presence of hydrogen bonded to nitrogen.