The alkenes are unsaturated hydrocarbons. They form a homologous series, the members ofwhich have the same chemical properties.They undergo addition reactions and are easily oxidised.(a) The following hydrocarbons are isomers.CH 3 CH CH CH 2CH 3CH 3 CH 2 CH 2 CH CH 2(i) Explain why these two hydrocarbons are isomers................................................................................................................................................................................................................................................................... [2](ii) Give the structural formula of another hydrocarbon which is isomeric with the above.[1](b) Give the structural formula and name of each of the products of the following additionreactions.(i) ethene and brominestructural formula of productname of product ................................................................................................... [2](ii) propene and hydrogenstructural formula of productname of product ................................................................................................... [2](iii) but-1-ene and waterstructural formula of productname of product ................................................................................................... [2]PhysicsAndMathsTutor.com
Question
The alkenes are unsaturated hydrocarbons. They form a homologous series, the members ofwhich have the same chemical properties.They undergo addition reactions and are easily oxidised.(a) The following hydrocarbons are isomers.CH 3 CH CH CH 2CH 3CH 3 CH 2 CH 2 CH CH 2(i) Explain why these two hydrocarbons are isomers................................................................................................................................................................................................................................................................... 2 Give the structural formula of another hydrocarbon which is isomeric with the above.1 Give the structural formula and name of each of the products of the following additionreactions.(i) ethene and brominestructural formula of productname of product ................................................................................................... 2 propene and hydrogenstructural formula of productname of product ................................................................................................... 2 but-1-ene and waterstructural formula of productname of product ................................................................................................... [2]PhysicsAndMathsTutor.com
Solution
(a) (i) These two hydrocarbons are isomers because they have the same molecular formula but different structural formulas. They both have the formula C5H10, but the arrangement of atoms in the molecule is different.
(ii) Another isomer could be CH3CH2CH(CH3)CH2.
(b) (i) The product of the reaction between ethene and bromine is 1,2-dibromoethane. Its structural formula is CH2BrCH2Br.
(ii) The product of the reaction between propene and hydrogen is propane. Its structural formula is CH3CH2CH3.
(iii) The product of the reaction between but-1-ene and water is butan-2-ol. Its structural formula is CH3CH(OH)CH2CH3.
Similar Questions
Alkanes and alkenes are both series of hydrocarbons.(a) (i) Explain the term hydrocarbon................................................................................................................................................................................................................................................................... [1](ii) What is the difference between these two series of hydrocarbons?..............................................................................................................................................................................................................................................
In relation to alkenes, which of the following statements is correct? 1. They all contain double bonds. 2. They can all be reduced to alkanes. 3. Aromatic compounds are also alkenes as they contain double bonds. A. Only 1 B. Only 2 C. Only 3 D. 1 and 2 E. 2 and 3
Which of the following statements about alkenes is not correct?A. They have reactive double bonds.B. They can form addition polymers.C. They react mainly by substitution.D. They can react with water to form alcohols.
What is an alkene?A saturated hydrocarbon with at least one carbon-carbon double bondA saturated hydrocarbon with no carbon-carbon double bondsAn unsaturated hydrocarbon with no carbon-carbon double bondsAn unsaturated hydrocarbon with at least one carbon-carbon double bond
Alkene hydrocarbon molecules have to contain what types of bonds?Question 5Select one:a.double bondsb.triple bondsc.ionic bondsd.single bonds
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