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प्रश्न
Diffentiate between absorption and adsorption.
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उत्तर
| Sr. No. | Absorption | Adsorption |
| 1. Definition | It is a process in which any substance (atoms, ions, or molecules) is taken by or absorbed by another substance, especially in the solid or liquid material. | The substances like gas, liquids or dissolved solids loosely adhere or stick to the surface of another substance which can be solid or liquid. |
| 2. Type of phenomenon | It is a bulk phenomenon. | It is a surface phenomenon. |
| 3. Type of process | Endothermic process. | Exothermic process. |
| 4. Rate of reaction | Uniform rate. | The reaction rate increases slowly and attains equilibrium. |
| 5. Concentration | Do not change its constant throughout the medium. | The concentration varies from bulk to the bottom of the absorbent. |
|
6. Temperature effect |
No effect of temperature. | Works at the lower temperature. |
| 7. Application | Cold storage, ice production, turbine inlet cooling, refrigerants, etc. | Air conditioning, water purification, synthetic resin, chillers, etc. |
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संबंधित प्रश्न
Explain why, osmosis can be considered to be a special kind of diffusion. Classify the following into
(i) osmosis, and (ii) diffusion :
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- preserving of pickles in salt
- spreading of smell of cake being baked in the kitchen
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- What could the group of materials P be ?
- Name the substances Q. Give two examples of such substances.
- Name the substances R. Write two examples of such substances.
- Name the substances S. Give two examples of such substances.
- Out of Q, R and S, which substances are malleable and ductile ?
A, B and C are all liquids. Liquid A has a comparatively low boiling point. On heating, liquid A vaporises completely without leaving behind any residue. Liquid A is being used increasingly as a fuel in motor vehicles either alone or by mixing with petrol. Liquid B has a very high boiling point. It also vaporises completely on heating, without leaving any residue. Liquid B is a conductor of electricity and used in making thermometers. Liquid C has a moderate boiling point. On heating, liquid C vaporises leaving behind a white solid D which is used in cooking vegetables. The condensation of vapours from C give a liquid E which turns anhydrous CuSO4 to blue.
(a) Which liquid could be an element ? Name this element.
(b) Which liquid could be a mixture ? Name this mixture.
(c) Which liquid could be a compound ? Name this compound.
(d) What could the solid D be ?
(e) What do you think is liquid E ?
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(a) What do you think could (i) constituent A, and (ii) liquid D be ?
(b) What could (i) constituent B, and (ii) liquid E be ?
(c) What could liquid C be ?
(d) How will you separate the mixture containing A, B and C ?
What's the solution?
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