The products of cracking are...
  • alkane + alkene
  • alkene + alkene
  • alkane + alcohol
  • alkane + alkane
Select from the list the correct formula for ethene.
  • C3H6
  • C2H4
  • C2H6
  • C4H2
An alkene molecule with one double bond contains 7 carbon atoms. How many hydrogen atoms does it contain?
  • 12
  • 14
  • 16
  • 15
In the cracking process...
  • the hydrocarbon vapor is heated with iodine
  • the hydrocarbon is mixed with hydrogen and heated
  • the hydrocarbon vapor is passed over a hot catalyst
  • the hydrocarbon is liquefied, then passed over a catalyst
The catalyst used in the cracking process in the lab is...
  • powdered ceramic pot
  • nickel
  • platinum
  • manganese
Cracking is an example of what type of chemical reaction?
  • Reduction
  • Oxidation
  • Neutralisation
  • Thermal decomposition
The alkene product of cracking...
  • is an unsaturated compound
  • has molecules in which each carbon atom has two bonds
  • is unreactive
  • will burn to produce carbon dioxide and hydrogen
What is the general formula for alkenes?
  • CnH2n+2
  • CnH2n+3
  • CnHn+1
  • CnH2n
Which of the following shows only the products that could be directly obtained by cracking C H ?
  • Alkanes up to C20H44, hydrogen and ethene
  • Alkanes up to C8H18, carbon dioxide and ethene
  • Propene, poly(ethene) and hydrogen
  • Alkanes up to C8H18, ethene and propene
The purpose of cracking is to...
  • split long chain hydrocarbons into more useful short chain molecules
  • split long chain hydrocarbons into their component molecules
  • split hydrocarbons into carbon and hydrogen
  • separate different sized hydrocarbons
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