Take this Exam: A-Level Chemistry: Bonding and Shapes | Zestly

Question 1

Which of the following species are polar?

Accepted Answer

H2O

Question 2

Which property is characteristic of metallic bonding?

Accepted Answer

High electrical conductivity in the solid state due to delocalized electrons.

Question 3

Which of the following correctly pairs a molecule with its bond angle?

Accepted Answer

BF3: 120 degrees

Question 4

Which factors contribute to the existence of permanent dipole-dipole forces?

Answer

A significant difference in electronegativity between bonded atoms.

Answer

An asymmetric molecular shape that prevents dipole cancellation.

Answer

The presence of a lone pair on every atom in the molecule.

Answer

The total number of protons in the nucleus.

Question 5

What is the primary reason for the high melting point of ionic compounds like NaCl?

Answer

The presence of strong covalent bonds between the sodium and chloride ions.

Answer

The formation of hydrogen bonds between the ions.

Answer

Strong electrostatic forces of attraction between oppositely charged ions in a giant lattice.

Answer

The presence of delocalized electrons that hold the lattice together.