Describe a chemical test that could be used to distinguish between pent-1-ene and pentane. ................................................................................................................................................ Explain,...

Describe a chemical test that could be used to distinguish between pent-1-ene and pentane.

................................................................................................................................................

Explain, using equations, the following steps in the free-radical mechanism of the reaction of methane with chlorine.

• Initiation

• Propagation

• Termination

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Expert Solution

1. Using bromine solution, pentene will decolourise the bromine solution because it adds on to the double bond in the structure, and nothing will happen with pentane

or

You could try Baeyer's test. Put KMnO4 in presence of dil: H2SO4. If the solution is unsaturated (Pentene or pentyne), it should decolourize the blue KMnO4 to white. Otherwise, if it is pentane, or saturated, nothing should happen. This is also known as Unsaturation test.

2.

Chain initiation: The chain is initiated (started) by UV light breaking a chlorine molecule into free radicals.

Cl₂ → 2Cl

Chain propagation reactions: These are the reactions which keep the chain going.

CH₄ + Cl→ CH₃ + HCl

CH₃ + Cl₂ → CH₃Cl + Cl

Chain termination reactions: These are reactions which remove free radicals from the system without replacing them by new ones.

2Cl→ Cl₂

CH₃ + Cl→ CH₃Cl

CH₃ + CH₃→ CH₃CH₃

queen_honey_blossom answered 2 years ago

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Describe a chemical test that could be used to distinguish between pent-1-ene and pentane. ................................................................................................................................................ Explain,...

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