Molecular Matters Polar and Non-Polar Solids

The video tutorial explains molecular solids, which are solids with molecules as constituent particles held together by intermolecular forces. These are classified into non-polar, polar, and hydrogen-bonded molecular solids. Non-polar molecular solids, like noble gases and non-polar molecules, are soft, have low melting points, and are poor conductors. Polar molecular solids, such as hydrogen chloride and solid ammonia, have strong dipole-dipole interactions, are generally soft, have higher melting points, and are non-conductors of heat and electricity.

What are the three types of molecular solids based on the nature of molecules?

• Non-polar, polar, and ionic

• Non-polar, polar, and hydrogen-bonded

• Metallic, ionic, and hydrogen-bonded

• Ionic, covalent, and metallic

Which of the following is a characteristic of non-polar molecular solids?

• High melting points

• Strong dipole-dipole interactions

• Weak van der Waals forces

• Good conductors of electricity

Non-polar molecular solids are typically:

• Good conductors of heat

• Soft and have low melting points

• Hard and have high melting points

• Composed of polar molecules

Which of the following is an example of a polar molecular solid?

• Helium

• Chlorine

• Argon

• Hydrogen chloride

What type of interaction holds polar molecular solids together?

• Metallic bonds

• Ionic bonds

• Covalent bonds

• Dipole-dipole interactions