Unit 2 AP Chemistry (Set I)

Which of the following compounds is covalent?

• Na₂O

• SO₂

• CaCl₂

• MgBr₂

Which of the following molecules has a central atom with a formal charge of zero?

• NH₃

• CO₂

• BF₃

What is the molecular geometry of BeCl₂ based on the VSEPR theory?

• Linear

• Bent

• Tetrahedral

• Trigonal Planar

Which molecule primarily exhibits hydrogen bonding?

• CH₄

• HF

• Ne

• I₂

Which of the following elements is the least electronegative?

• Fluorine

• Oxygen

• Nitrogen

• Cesium

• 1

• 2

• 3

• 4

Which compound is expected to have the highest lattice energy?

• NaF

• MgO

• KI

• CaS

Which of the following molecules is non-polar?

• H₂O

• NH₃

• CO₂

• OF₂

The sea of electrons in metallic bonding is responsible for which property of metals?

• Insolubility in water

• High malleability and ductility

• Ability to form complex ions

• Tendency to form covalent bonds

Which of the following pairs of elements is least likely to form an ionic bond?

• Ca and O

• Na and Br

• C and H

• Mg and Cl