The raindrop acquires a spherical shape and ink spread over blotting paper due to:
Correct answer: A. Surface tension
- A. Surface tension
- B. Adhesive forces
- C. Viscosity
- D. Polarity
- E. Latent heat of vaporization
Explanation
A raindrop falling through the atmosphere forms a roughly spherical structure due to the surface tension of water. This surface tension is the "skin" of a body of water that makes the molecules stick together. The cause is the weak hydrogen bonds that occur between water molecules.
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Chemical bonding explains molecular shape through VSEPR theory and distinguishes sigma bonds from pi bonds. Questions involve hybridization, bond angles, dipole moment and bond energy, including how electron-pair repulsion determines geometry and how bond polarity differs from the overall polarity of a molecule.
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