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13 Cards in this Set
- Front
- Back
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What is an unsaturated hydrocarbon ?
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Carbons that contain one or more double or triple bonds.
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What is an alkene ?
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A hydrocarbon that contains at least one double carbon-carbon bond.
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What is an alkyne ?
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A hydrocarbon that contains at least one triple darbon-carbon bond.
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What would the hybdridisation of an alkane, alkene and a alkyne be ?
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1. Alkane- sp3
2. Alkene- sp2 3. Alkyne- sp |
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True or false: The carbon atoms in alkenes can freely rotate due to their double bond.
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False. They cannot freely rotate due to their double bonds.
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Describe why alkenes and alkynes are more reactive than alkanes.
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Single carbon-carbon bonds are present in alkanes, this single bond consists of a single, strong sigma bond which causes it to be relatively nonreactive. Alkenes and alkynes on the other hand contain pi bonds along with a single sigma bond. These pi bonds are relatively weaker and will form bonds with other molecules/atoms, therefore they are responsible for the reactive properties of alkenes and alkynes.
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What is the general formula for alkenes ?
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CnH2n.
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What is the general formula for alkynes ?
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CnH2n-2.
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What are the two possible geometric isomers of alkenes ? Indicate which isomer is more stable.
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1. Cis
2. Trans (more stable) |
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What is a polymer?
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A molecules that has a high molecular mass made by sequentially bonding repeating units (monomers).
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What is the process called where a polymer is made from a bunch of monomers ?
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Addition polymerisation or free-radical polymerisation.
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What happens during 'cross-linking' of a polymer ?
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Chemical bonds form between different chains to strengthen the substance.
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What are the three steps of polymerisation ?
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1. Initiation
2. Propagation 3. Termination |
