Molecules at the surface of solid have.................energy than molecules those inside.
Correct answer: A. higher
- A. higher
- B. lower
- C. some times higher & some times lower
- D. none
Explanation
At the surface, a molecule is on one side surrounded by molecules of the same type and on the other side of another type. Therefore the net interaction force is no longer zero. So molecules at the surface of the solid have more energy than the molecules inside the solid.
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Solutions are described using molarity, molality, normality, mole fraction, percentage concentration and parts per million. Coverage also includes vapour-pressure lowering, boiling-point elevation, freezing-point depression and osmotic pressure, then distinguishes true solutions, colloids and suspensions by particle size, stability, light scattering and settling.
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