Module 4 - Exam Questions Questions And Answers Latest Update 2024 (Verified Solutions)

1-Bromobutane (Mr, 136.9) can be made from a reaction of butan-1-ol, C4H9OH, as shown in the equation below. C4H9OH + KBr + H2SO4 --> C4H9Br + KHSO4 + H2O(i) Calculate the atom economy for the formation of 1-bromobutane in this reaction. (ii) Suggest a reactant, other than a different acid, that could be used to improve the atom economy of making 1-bromobutane by the same method. (2 marks) {Ans: 136.9/(136.9 + 1 + 18 +32.1 + 64 + 39.1) x100 = 47% LiBr/NaBr}Explain what is meant by the terms structural isomer and stereoisomer. Explain why some alkenes have E/Z isomerism. (3 marks) {Ans: Structural: isomer with same molecular formula but a different structural formula Stereo: isomers with the same structural formula but a different arrangement in space Have a double carbon to carbon bond which restricts rotation and has different groups on each carbon of the double bond.}Explain why the straight chain isomer of C10H22 has a higher boiling point than any of its branched chain structural isomers. (2 marks) {Ans: Branched chains have less surface contact So have fewer induced dipole-dipole interactions which require less energy to overcome}Radical substitution produces a mixture of organic products. Suggest