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All colloidal sols show:...

All colloidal sols show:

A

Very high osmotic pressure

B

High osmotic pressure

C

Low osmotic pressure

D

No osmotic pressure

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Colloidal Sols:** - Colloidal sols are mixtures where tiny particles (colloids) are dispersed in a continuous medium (usually a liquid). The size of these particles typically ranges from 1 nm to 1000 nm. 2. **Definition of Osmotic Pressure:** - Osmotic pressure is a colligative property that describes the pressure required to stop the flow of solvent through a semi-permeable membrane from a dilute solution to a concentrated solution. It depends on the number of solute particles in a solution. 3. **Comparison with True Solutions:** - In true solutions, solute particles are much smaller and more numerous than in colloidal solutions. This means that true solutions exhibit higher osmotic pressures compared to colloidal sols. 4. **Osmotic Pressure in Colloidal Sols:** - Due to the larger size of colloidal particles, the number of moles of particles in a colloidal solution is lower than in a true solution. Consequently, the osmotic pressure exerted by colloidal sols is lower. 5. **Conclusion:** - Therefore, all colloidal sols show low osmotic pressure compared to true solutions. **Final Answer:** - All colloidal sols show low osmotic pressure. ---
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