1. Comparing (Similarities and Differences) Properties of Alkanes and Alkenes
| Physical Properties | Alkanes | Alkenes |
| Physical state | Physical state changes from gas to liquid when going down the series. | Same with alkanes. |
| Electrical conductivity. | Do not conduct electricity at any state. | Same with alkanes. |
| Boiling points and melting points | Low boiling points and melting points (number of carbon atoms per molecule increases). | Same with alkanes. |
| Density | Low densities (number of carbon atom per molecule increases). | Same with alkanes. |
| Solubility in water | Insoluble in water (soluble in organic solvent) | Same with alkanes. |
| Chemical Properties | Alkanes (Substitution reaction) | Alkenes (Addition reaction) |
| Reactivity | Unreactive | Reactive |
| Combustion | Burn in air and produce yellow sooty flame. | Burn in air and produce yellow and sootier flame compare to alkanes. |
| Reaction with bromine solution | No reaction. | Decolourise brown bromine solution. |
| Reaction with acidified potassium manganate(VII) solution | No reaction. | Decolourise purple acidified potassium manganate(VII) solution. |
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