CHEM212 BIOCHEMISTRY LAB Module 2 Final Assessment Q & A 2026 (Complete And Verified Study material) (18pages) LEARNEXAMS

1. True or False: London dispersion forces are the only type of van der Waals forces that occur in nonpolar molecules. - Answer: False. While London dispersion forces are a type of van der Waals force and do occur in nonpolar molecules, they are not the only type; dipole-dipole interactions can also be present if the nonpolar molecule has an instantaneous dipole. 2. Fill in the blank: The strength of hydrogen bonding is primarily determined by the __________ of the hydrogen atom to the electronegative atom it is bonded to. - Answer: Distance. The closer the hydrogen atom is to the electronegative atom, the stronger the hydrogen bond. 3. Multiple Choice: Which of the following is not a factor in the strength of dipole-dipole interactions? A) Molecular size B) Molecular shape C) The presence of a pi bond D) Electronegativity difference - Answer: C) The presence of a pi bond. Pi bonds do not directly affect the strength of dipole-dipole interactions. 4. Open-ended: Explain the role of intermolecular forces in the boiling point of organic compounds. - Answer: Intermolecular forces play a crucial role in determining the boiling points of organic compounds. Stronger intermolecular forces require more energy to overcome, resulting in higher boiling points. For example, hydrogen bonds are stronger than van der Waals forces, so compounds with hydrogen bonding generally have higher boiling points compared to those with only van der Waals forces.