- A) Ionic bond
- B) Covalent bond
- C) Hydrogen bond
- D) Van der Waals force
AP Biology MCQ
Total MCQ: 70
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62 What is the shape of a water molecule?
- A) Linear
- B) Bent
- C) Tetrahedral
- D) Trigonal planar
63 What property of water is primarily due to hydrogen bonding?
- A) High density
- B) Low boiling point
- C) Cohesion
- D) Low heat capacity
64 How does hydrogen bonding affect the boiling point of water?
- A) Lowers the boiling point
- B) Raises the boiling point
- C) No effect
- D) Creates vapor pressure
65 What happens to water molecules as they freeze?
- A) They become denser
- B) They form a crystalline structure
- C) They become nonpolar
- D) They evaporate
66 Which property allows water to rise in plants against gravity?
- A) Cohesion
- B) Adhesion
- C) Surface tension
- D) All of the above
67 What effect does temperature have on hydrogen bonds in water?
- A) Decreases bond strength at high temperatures
- B) Increases bond strength at high temperatures
- C) No effect
- D) Bonds become permanent
68 How does water’s polarity influence its ability to dissolve substances?
- A) Polar substances dissolve easily
- B) Nonpolar substances dissolve easily
- C) All substances dissolve equally
- D) None dissolve
69 What is the chemical formula of water?
- A) H2O
- B) H2O2
- C) HO
- D) H3O
70 How many hydrogen bonds can a single water molecule form?
- A) 2
- B) 3
- C) 4
- D) 5