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Why are adsorbate particles attracted an...

Why are adsorbate particles attracted and retained on the surface of adsorbent ?

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To understand why adsorbate particles are attracted and retained on the surface of an adsorbent, we can break down the explanation into several key points: ### Step-by-Step Solution: 1. **Definition of Adsorbate and Adsorbent**: - Adsorbate refers to the substance that is being adsorbed (e.g., gas or liquid molecules). - Adsorbent is the material that adsorbs the adsorbate (e.g., solid surfaces like activated charcoal). ...
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Amongst the following statements regarding adsorption, those that are valid are : (a) DeltaH becomes less negative as adsorption proceeds. (b) On a given adsorbent, ammonia is adsorbed more than nitrogen gas. (c) On adsorption, the residual force acting along the surface of the adsorbent increases. (d) With increase in temperature, the equilibrium concentration of adsorbate increases.

Whenever a mixture of gases is allowed to come in contact with a particular adsorbent under the same conditions, the more strong adsorbate is adsorbed to greater extent irrespective of its amount present, e.g., H_(2)O is adsorbed to more extent on silica gel than N_(2) and O_(2) . This shows that some adsorbates are preferentially adsorbed. It is also observed that preferentially adsorbable adsorbent can displace a weakly adsorbed substance from the surface of an adsorbent. Preferential adsorption depends on strength of attraction, surface area, polar nature and other factors. Which of the following isomer of C_(6)H_(14) is adsorbed to maximum extent?

Whenever a mixture of gases is allowed to come in contact with a particular adsorbent under the same conditions, the more strong adsorbate is adsorbed to greater extent irrespective of its amount present, e.g., H_(2)O is adsorbed to more extent on silica gel than N_(2) and O_(2) . This shows that some adsorbates are preferentially adsorbed. It is also observed that preferentially adsorbable adsorbent can displace a weakly adsorbed substance from the surface of an adsorbent. Preferential adsorption depends on strength of attraction, surface area, polar nature and other factors.

Whenever a mixture of gases is allowed to come in contact with a particular adsorbent under the same conditions, the more strong adsorbate is adsorbed to greater extent irrespective of its amount present, e.g., H_(2)O is adsorbed to more extent on silica gel than N_(2) and O_(2) . This shows that some adsorbates are preferentially adsorbed. It is also observed that preferentially adsorbable adsorbent can displace a weakly adsorbed substance from the surface of an adsorbent. Preferential adsorption depends on strength of attraction, surface area, polar nature and other factors. When temperature is increased in chemisorption then :

CBSE COMPLEMENTARY MATERIAL-SURFACE CHEMISTRY-VERY SHORT ANSWER TYPE QUESTIONS (1 MARK)
  1. Why does a gas mixed with another gas not form a colloidal system ?

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  2. Why are adsorbate particles attracted and retained on the surface of a...

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  3. Explain the terms sorption and desorption .

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  4. "Chemisorption is highly specific. " Illustrate with an example .

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  5. "Adsorbents in finely divided from are more effective ." Why ?

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  6. Name two compounds used as adsorbent for controlling humidity .

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  7. Mention one shape selective catalyst used to convert alcohol directly ...

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  8. Generally high temperature is favourable for chemisorption . ' Why ?

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  9. Name the catalyst used in the following process : (a) Haber's proce...

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  10. Which group elements show maximum catalytic activity for hydrogenation...

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  11. Why gas masks are used by miners in coal mines while working ?

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  12. Write the chemical reaction involed in the preparation of sulphur sol.

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  13. What are optimum temperature and pH for the enzymes to act best ?

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  14. What are the physical states of dispersed phase and disperation medium...

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  15. What is the composition of colloidion solution ?

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  16. Why do colloidal particles show Brownian movement ?

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  17. State the sigh of entropy change involved when the molecules of a subs...

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  18. Why does sky appear blue to us ?

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  19. What happens when hydrated ferric oxide and arsenious sulphide sols ar...

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  20. Gelatin is generally added to ice creams. Why?

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