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Surface Chemistry (Grades 11-12)

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Surface Chemistry

1. 
As the temperature of the solid surface increases, the extent of adsorption of a gas
  1. increases
  2. decreases
  3. remains unchanged
  4. first increases then decreases
 
2. 
Adsorption is
  1. exothermic
  2. endothermic
  3. irreversible
  4. homogenous
3. 
Enzymes are
  1. homogenous catalysts
  2. heterogenous catalysts
  3. acid catalysts
  4. base catalysts
 
4. 
What is the size of colloidal particles?
  1. [math]10^-10 m to 10^-9 m[/math]
  2. [math]10^-6 m to 10^-4 m[/math]
  3. [math]10^-9 m to 10^-6 m[/math]
  4. [math]10^-5 m to 10^-2 m[/math]
5. 
The rate of reaction depends on the surface area of catalyst in
  1. homogenous catalysis
  2. enzyme catalysis
  3. acid catalysis
  4. heterogenous catalysis
 
6. 
The bond formed by a gaseous reactant with the surface of solid catalyst is
  1. ionic
  2. coordinate
  3. covalent
  4. metallic
7. 
What is formed when a gaseous reactant is in contact with the surface of a solid catalyst?
  1. homogeneous catalyst
  2. ionic bond
  3. heterogeneous catalyst
  4. metallic bond
 
8. 
Physisorption is defined as the adsorption that involves                                  forces between adsorbate and adsorbent particles.
9. 
A colloidal system in which one liquid is dispersed in another liquid immiscible with it is called an emulsion.
  1. True
  2. False
 
10. 
A substance that decreases the rate of a chemical reaction is called an                         .

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