Multiple Choice
Which of the following intermolecular forces is the weakest?
13. Liquids, Solids & Intermolecular Forces
Intermolecular Forces
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Which of the following is not a result of hydrogen bonds?
A
High boiling point of water
B
Ice floating on water
C
Low viscosity of water
D
DNA double helix structure
Verified step by step guidance1
Understand the concept of hydrogen bonding: Hydrogen bonds are weak interactions that occur between a hydrogen atom covalently bonded to a highly electronegative atom (like oxygen or nitrogen) and another electronegative atom. These bonds significantly affect the physical properties of substances.
Analyze the effect of hydrogen bonds on the boiling point of water: Hydrogen bonds increase the boiling point of water because they require additional energy to break, thus water boils at a higher temperature compared to other molecules of similar size without hydrogen bonds.
Consider the role of hydrogen bonds in ice floating on water: In ice, hydrogen bonds form a lattice structure that is less dense than liquid water, causing ice to float. This is a direct result of hydrogen bonding.
Examine the influence of hydrogen bonds on the DNA double helix structure: Hydrogen bonds between complementary base pairs (adenine-thymine and guanine-cytosine) stabilize the DNA double helix, making hydrogen bonds crucial for the structure of DNA.
Evaluate the viscosity of water: Viscosity is a measure of a fluid's resistance to flow. Hydrogen bonds do not significantly affect the viscosity of water, which is relatively low compared to other liquids. Therefore, low viscosity is not a result of hydrogen bonds.
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