Catalysis: An Introduction M.F.Baidoo 22.01. 2024
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Questions and Answers

What is the main role of catalysts in chemical transformations?

  • Increase the pressure in industrial processes
  • Completely change the products obtained
  • Slow down chemical reactions
  • Remain unchanged at the end of the process (correct)
  • Why are catalysts considered indispensable in the chemical industry?

  • To obtain approximately 85-90% of chemical products (correct)
  • To increase activation energy
  • To change the properties of products
  • To slow down reaction rates
  • What characteristic distinguishes catalytic reactions from non-catalytic reactions?

  • They involve a substance that accelerates the reaction (correct)
  • They occur at low temperatures only
  • They are slower than non-catalytic reactions
  • They have higher activation energies
  • How do catalysts help in chemical reactions?

    <p>By providing a reaction path with lower activation energy</p> Signup and view all the answers

    What difficulty do catalysts help overcome in industrial processes?

    <p>Maintaining high temperature and pressure in reactors</p> Signup and view all the answers

    Which process involves the use of Zeolites as a catalyst?

    <p>Catalytic cracking of crude oil</p> Signup and view all the answers

    Which catalyst is commonly used in the ammonia synthesis process?

    <p>Pt-Rh</p> Signup and view all the answers

    In which reaction does Ethylene react with Chlorine to form Vinyl Chloride?

    <p>Viny Chloride (ethylene + Cl2)</p> Signup and view all the answers

    Which catalyst is typically used in the reforming of naphtha to gasoline?

    <p>Pt, Pt-Re, Pt-Ir</p> Signup and view all the answers

    What type of catalysis is associated with lower reproducibility difficulty and more precise control over reaction conditions?

    <p>Homogeneous catalysis</p> Signup and view all the answers

    Which catalyst is used in the water-gas shift reaction to convert CO to H2?

    <p>Ni</p> Signup and view all the answers

    In heterogeneous catalysis, the catalyst and the reaction mixture belong to:

    <p>Different phases</p> Signup and view all the answers

    Which type of catalysis involves the use of enzymes?

    <p>Enzymatic/biocatalysis</p> Signup and view all the answers

    Which of the following is NOT a product of the carbonylation reaction involving methanol and CO?

    <p>Methyl acetylene</p> Signup and view all the answers

    Which metal is commonly used as a catalyst in the production of adiponitrile?

    <p>Nickel (Ni)</p> Signup and view all the answers

    In the chemical/petrochemical industry, which reactant is involved in the polymerization process?

    <p>Propylene</p> Signup and view all the answers

    What is a common feature of heterogeneous catalysts?

    <p>They can be easily separated from the reaction mixture</p> Signup and view all the answers

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