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Cracking (IGCSE Chemistry) Flashcards | StudBud
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Cracking (IGCSE Chemistry)
Cracking (IGCSE Chemistry)
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A quiz to support the learning of cracking of alkanes.
Flashcards
17 cards
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Practice quiz
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Questions
17
Answers
1
Apart from a smaller alkane what else is produced?
Alkane
Alkene
Nothing
Alkyne
2
How do we know that alkenes are produced?
alkenes turn bromine water yellow
alkenes turn bromine water orange
alkenes turn bromine water colourless
alkenes turn bromine water clear
3
What alkane is cracked to produce ethene (C
2
H
4
), propene (C
3
H
6
) and octane (C
8
H
18
)
C11H24
C12H26
C10H22
C13H28
4
What name is given to a substance that speeds up a reaction without being used up?
Product
Catalyst
Reactant
Hydrocarbon
5
What alkane is cracked to produce 2 molecules of ethene (C
2
H
4
) and octane (C
8
H
18
)
C11H24
C12H26
C13H28
C10H22
6
What happens to the long chain alkane during cracking?
Burns
Melts
Gets bigger
Is broken down
7
If C
12
H
26
is cracked and ethene (C
2
H
4
) is produced what else will be made?
C10H20
C11H24
C10H22
C11H22
8
What temperature is used in cracking?
100oC
10oC
500oC
250oC
9
Which fraction is most in demand?
Gasoline
Bitumen
Refinery Gases
Diesel
10
What type of reaction is cracking?
Thermal decomposition
Addition
Combustion
Substitution
11
What type of molecule do we crack?
Long chain alkane
Short chain alkane
Any type of Hydrocarbon
Any type of alkane
12
What process is used to meet this additional demand?
Cracking
Extra fractional distillation
Using other fuels
Making more crude oil
13
If C
12
H
26
is cracked and propene (C
3
H
6
) is produced what else will be made?
C9H18
C9H20
C10H22
C10H22
14
Which of these is a long chain alkane?
C2H4
C5H12
C20H40
C12H26
15
What is the purpose of the heating?
burn off the alkane
melt the alkane
vapourise the alkane
solidify the alkane
16
What type of catalyst is used in this experiment?
Palladium
Thermal
Nickel
Zeolite
17
Does the supply of gasoline from fractional distillation meet this demand?
yes
no
