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High School: 9th and 10th Grade
Chemistry
Crude Oil - Cracking
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Q.1
The products of cracking are...
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alkane + alkene
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alkene + alkene
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alkane + alcohol
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alkane + alkane
Q.2
Select from the list the correct formula for ethene.
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C3H6
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C2H4
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C2H6
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C4H2
Q.3
An alkene molecule with one double bond contains 7 carbon atoms. How many hydrogen atoms does it contain?
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12
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14
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16
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15
Q.4
In the cracking process...
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the hydrocarbon vapor is heated with iodine
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the hydrocarbon is mixed with hydrogen and heated
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the hydrocarbon vapor is passed over a hot catalyst
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the hydrocarbon is liquefied, then passed over a catalyst
Q.5
The catalyst used in the cracking process in the lab is...
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powdered ceramic pot
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nickel
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platinum
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manganese
Q.6
Cracking is an example of what type of chemical reaction?
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Reduction
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Oxidation
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Neutralisation
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Thermal decomposition
Q.7
The alkene product of cracking...
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is an unsaturated compound
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has molecules in which each carbon atom has two bonds
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is unreactive
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will burn to produce carbon dioxide and hydrogen
Q.8
What is the general formula for alkenes?
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CnH2n+2
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CnH2n+3
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CnHn+1
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CnH2n
Q.9
Which of the following shows only the products that could be directly obtained by cracking C H ?
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Alkanes up to C20H44, hydrogen and ethene
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Alkanes up to C8H18, carbon dioxide and ethene
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Propene, poly(ethene) and hydrogen
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Alkanes up to C8H18, ethene and propene
Q.10
The purpose of cracking is to...
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split long chain hydrocarbons into more useful short chain molecules
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split long chain hydrocarbons into their component molecules
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split hydrocarbons into carbon and hydrogen
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separate different sized hydrocarbons
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