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Surface Chemistry (Grades 11-12)

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Surface Chemistry

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.
Adsorption is                .
  1. exothermic
  2. endothermic
  3. irreversible
  4. homogenous
Enzymes are                       .
  1. homogenous catalysts
  2. heterogenous catalysts
  3. acid catalysts
  4. base catalysts
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]
The rate of reaction depends on the surface area of a catalyst in
  1. homogeneous catalysis.
  2. enzyme catalysis.
  3. acid catalysis.
  4. heterogeneous catalysis.
The bond formed by a gaseous reactant with the surface of solid catalyst is
  1. ionic
  2. coordinate
  3. covalent
  4. metallic
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
Physisorption is defined as the adsorption that involves                                  forces between adsorbate and adsorbent particles.
A colloidal system in which one liquid is dispersed in another liquid immiscible with it is called an emulsion.
  1. True
  2. False
A substance that decreases the rate of a chemical reaction is called an                         .

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