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Lesson: Cracking of Hydrocarbons

Worksheet • 7 Questions

Q1:

In which of the following properties is an increase observed when hydrocarbon fuels undergo cracking?

  • AVolatility
  • BIgnition temperature
  • CMolecular size
  • DViscosity
  • EMelting point

Q2:

Which type of chemical reaction is cracking an example of?

  • ADecomposition
  • BDisplacement
  • CHydrolysis
  • DCondensation
  • EAddition

Q3:

In catalytic cracking, a gaseous hydrocarbon flows over a heated catalyst and is converted to more valuable products. Which of the following catalyst properties cannot be increased to produce a higher reaction rate?

  • A Particle size
  • B Temperature
  • C Porosity
  • D Mass
  • E Surface area

Q4:

The cracking of a nonane molecule can produce a range of products.

If the cracking of a nonane molecule produces two molecules including propene, what is the name of the second product?

  • AHexane
  • BHeptene
  • CPentane
  • DPentene
  • EHexene

Which of the following pairs of molecules can be produced by the cracking of a nonane molecule, assuming there are no other products?

  • AButane + pentene
  • BEthene + hexene
  • CPropane + heptene
  • DOctane + methane
  • EHexene + propene

Which of the following groups of molecules can be produced by the cracking of a nonane molecule, assuming there are no other products?

  • APropane + ethene + butene
  • BPropene + propene + propene
  • CEthene + ethane + pentane
  • DButene + propane + methane
  • EHexene + propane + ethene

Q5:

Cracking may be used to convert one fraction of crude oil to a mixture of hydrocarbons with the properties of a different fraction. Which of the following fuels can be replicated via the cracking of kerosene?

  • AGasoline and LPG
  • BDiesel oil, gasoline, and LPG
  • CGasoline only
  • DLPG only
  • EDiesel oil and gasoline

Q6:

Which of the following statements is true?

  • ACracking is possible without a catalyst.
  • BCracking always generates gaseous products.
  • CCracking increases the chain length of the hydrocarbon.
  • DCracking is exothermic.
  • ECracking is a method of polymerization.

Q7:

In which range of temperatures is catalytic cracking usually performed?

  • A 5 0 0 7 0 0 C
  • B 7 0 0 9 0 0 C
  • C 0 1 0 0 C
  • D 3 0 0 5 0 0 C
  • E 1 0 0 3 0 0 C
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