Polarity and IMFAs

Which of the following molecules is polar?

• H₂
• CF₄
• PH₃
• CH₂F₂

Which of the following molecules is non-polar?

• NH₃
• BCl₃
• SO₂
• ICl

Which IMFA is the predominant IMFA for non-polar molecules?

• London Dispersion Forces
• Dipole Dipole
• Hydrogen Bonding
• Both Dipole Dipole and Hydrogen Bonding

Which of the following does NOT contain hydrogen bonding?

• NH₃
• H₂O
• CF₄
• HOF

Which IMFA contains a temporary dipole?

• London Dispersion Forces
• Dipole Dipole
• Hydrogen Bonding
• Both London Dispersion Forces and Dipole Dipole

Which molecular shape has a central atom surrounded by 3 atoms and 1 lone pair?

• Trigonal planar
• Trigonal pyramid
• Bent
• Linear
  linear

What is the molecular shape for CH₄?

• Trigonal planar
• Trigonal pyramid
• Tetrahedral
• Bent

What happens to the melting point as molar mass increases?

• Decreases
• Increases
• Impossible to tell
• It increases then decreases

How many lone pairs are on the central atom in BCl₃?

• 0
• 1
• 2
• 6

Which bond has electrons that are shared equally?

• Non-polar ionic
• Non-polar covalent
• Polar covalent
• Ionic