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प्रश्न
Give reasons for the following observations :
Powdered substances are more effective adsorbents.
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उत्तर
Adsorption is a surface phenomenon. Therefore, the process of adsorption is directly proportional to the surface area available for adsorption to take place. Both physisorption and chemisorption increase with an increase in the surface area. Powdered substances have large surface areas. Hence, powdered substances are more effective adsorbents.
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संबंधित प्रश्न
Write the differences between physisorption and chemisorption with respect to the following:
(i) Specificity
(ii) Temperature dependence
(iii) Reversibility and
(iv) Enthalpy change
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Discuss the effect of temperature on the adsorption of gases on solids.
How does chemisorption vary with temperature?
Adsorption increases when ____________.
Chromatography is based on the principle of ____________.
Why do physisorption and chemisorption behave differently with rise in temperature?
What is the role of diffusion in heterogenous catalysis?
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