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This quiz contains 10 questions from a mix of 1 subtopics.
What is the balanced symbol equation to represent the cracking of decane into ethene and octane?
C10H22 ➔ C2H4 + C8H18
C10H22 ➔ C2H6 + C8H16
C10H22 ➔ C2H6 + C8H18
C10H24 ➔ C2H4 + C8H18
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What is the primary purpose of cracking long-chain hydrocarbons?
to convert less useful fractions into more valuable smaller hydrocarbons
to reduce the demand for crude oil
to create aromatic hydrocarbons
to increase the yield of alkenes
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Which of the following statements about cracking is true?
cracking is essential for producing alkenes
cracking increases the length of hydrocarbon chains
cracking is not used in the production of plastics
the point at which the chain breaks is always the same
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Which of the following are the two principal methods of cracking?
thermal cracking and catalytic cracking
catalytic cracking and polymerisation
fractional distillation and catalytic cracking
thermal cracking and fractional distillation
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What is the approximate temperature and pressure used in thermal cracking?
450°C and slightly above atmospheric pressure
1,000°C and 70 atm
450°C and 70 atm
1,000°C and slightly above atmospheric pressure
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What type of catalyst is used in catalytic cracking?
zeolite
vanadium oxide
nickel
iron oxide
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Which of the following is NOT a benefit of using catalysts in cracking?
increasing the rate of reaction
increasing the yield of alkenes
allowing for lower temperatures and pressures
enhancing efficiency
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What is the main product of thermal cracking?
fuels for transportation
alkanes
alkenes
aromatic hydrocarbons
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What is the approximate temperature used in catalytic cracking?
450°C
70°C
1,000°C
100°C
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What is the primary use of alkenes produced through thermal cracking?
lubricant manufacturing
aromatic hydrocarbon synthesis
plastics and polymer production
fuels for transportation
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