All alkanes have the same
empirical formula
general formula
molecular formula
structural formula
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All alkanes have the same
empirical formula
general formula
molecular formula
structural formula
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A single molecule of decane, C10H22 , is cracked.
Which of these mixtures could not be formed?
pentene and pentane
ethene, butene and butane
propene, propane and butene
hexene and propane
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Which pollutant cannot form when alkane fuels are burned in car engines?
hydrogen chloride
sulfur dioxide
carbon particulates
carbon monoxide
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Ethane reacts with bromine in the presence of ultraviolet radiation.
C2H6 + Br2 → C2H4Br2 + H2
C2H6 + Br2 → C2H5Br + HBr
C2H6 + Br2 → 2CH3Br
C2H6 + Br2 → CH4 + CH2Br2
☐ | A | homolytic breaking of a Br–Br bond | |
☐ | B | heterolytic breaking of a Br–Br bond | |
☐ | C | homolytic breaking of a C–H bond | |
☐ | D | heterolytic breaking of a C–H bond |
homolytic breaking of a Br–Br bond
heterolytic breaking of a Br–Br bond
homolytic breaking of a C–H bond
heterolytic breaking of a C–H bond
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Methane reacts with excess chlorine in UV light.
Which process occurs in the initiation step?
(1)
Which of these molecules could not be formed in a termination step?
C2H6
CH3Cl
CH2Cl2
HCl
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When C20H42 is cracked, each molecule produces one molecule of ethene, one molecule of butane and two molecules of hydrocarbon E.
What is the molecular formula of E?
C7H13
C7H14
C14H26
C14H28
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Petrol, bioethanol and hydrogen are fuels.
All three of these fuels
burn to produce greenhouse gases
are overall carbon neutral
are overall sustainable
biodegrade rapidly
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Cyclopentane undergoes free radical substitution with bromine.
C5H8 + Br2 → C5H8Br2
C5H10 + Br2 → C5H10Br2
C5H10 + Br2 → C5H8Br2 + H2
C5H10 + Br2 → C5H9Br + HBr
only the initiation step involves homolytic bond fission
only some bromine is converted to free radicals in the initiation step
propagation forms more product than termination
further substitution reactions are likely to occur
C5
B
C5H8B
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