Unit 4: Practice Multiple Choice

Hydrogen bonding occurs when hydrogen is bonded to N, O, or F.  Which of the following has hydrogen bonding?

• CBr₄
• NO₂
• H₂S
• NH₃

Which substance would have the weakest intermolecular forces of attraction?

• CH₄

• NaCl

• H₂O

• MgF₂

Intermolecular forces for: NH₃

• Dispersion Force

• Dipole dipole

• Hydrogen bonding

Intermolecular forces for: CO₂

• Dispersion Force

• Dipole dipole

• Hydrogen bonding

Which of the following molecules contains only London dispersion forces?

• CF₄
• HCl
• H₂O
• MgO_(aq)

Which of the following molecules would have the lowest boiling point?

• CH₄
• C₂H₆
• C₃H₈
• C₄H₁₀

HCl and F₂ both have a molecular mass of approximately 36 g/mol. Based on IMF, which will have a lower boiling point?

• HCl
• F₂

Which of the following will NOT have hydrogen bonding?

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• 
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Which of the following will have the lowest melting point?

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Which substance has the weakest intermolecular forces?

• Substance A, boiling point of 75 °C

• Substance B, boiling point of 105 °C

• Substance C, boiling point of 25 °C

• Substance d, boiling point of 45 °C