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A-Level ChemistryYear 2022Q2

4   2 This is a question about hydrocarbons. (a) State what is meant by the term hydrocarbon. (1) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... (b) Explain why 2,2‑dimethylpropane has a much lower boiling temperature than its isomer pentane. Detailed descriptions of the forces involved are not required. (2) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... (c) The heterolytic bond fission of a sigma (σ) bond in an alkane would produce (1) A only carbocations B only free radicals C free radicals and ions D ions (Total for Question 2 = 4 marks) Turn over 5   3 This is a question about dihalogenoalkanes. (a) Dihalogenoalkanes are formed when alkenes react with halogens. (i) Complete the mechanism for the production of a dihalogenoalkane from 2‑methylbut‑1‑ene and chlorine. Include curly arrows and any relevant lone pairs. (3) Cl Cl (ii) Give the name of the dihalogenoalkane produced. (1) .................................................................................................................................................................................................................................................................................... (b) What is the classification of the dihalogenoalkane shown? Cl Cl (1) A primary B secondary C tertiary D primary and secondary (Total for Question 3 = 5 marks)

Paper Source:9ch0-02-que-20220621.pdf

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Exam Specification Info

This question is part of the UK A-Level Chemistry syllabus. In the actual exam, structured questions typically require linking specific keywords to gain full marks. Applaa helps you drill these topics.

Syllabus levelAdvanced Level (A-Level)

SubjectChemistry

Official MarksVariable (2–6 marks)

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