polymerised to form poly(propene). Describe what you would observe when a sample of propene gas and a sample of poly(propene) solid are shaken with separate, small volumes of orange bromine water.","markscheme":"- States that with propene, the orange/brown bromine water turns colourless (decolourises) B1\n- States that with poly(propene), the bromine water remains orange/brown (no reaction / no colour change) B1\n- Mentions that bromine water is initially orange/yellow/brown, or links the reactivity to propene being unsaturated (having a $C=C$ double bond) while poly(propene) is saturated (having only $C-C$ single bonds) B1","marks":3,"order":0,"markingRubric":null,"tableImages":[],"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null,"walkthroughVideo":null},{"id":"8762b76e-8b7b-424c-932c-25d323cdab16","revisionId":"f0c17d5d-6102-40fb-a942-c56695e3ee3b","questionNumber":null,"questionType":"LA","specification":"","difficulty":4,"difficultyBand":"medium","totalMarks":3,"sourceTitle":null,"calculatorUse":null,"isCalculation":false,"parts":[{"id":"b9872816-af22-4810-8227-e5df43c771c1","label":null,"content":"An environmental chemist is analyzing two waste streams from a plastics manufacturing facility. One stream contains liquid hex-1-ene monomer, and the other contains solid poly(hex-1-ene) pellets.\n\nThe chemist adds a few drops of orange-brown bromine water to a sample of each stream and shakes them.\n\nDescribe and explain the observations for both samples, identifying the structural feature that accounts for this difference in reactivity.","markscheme":"- **Observation with hex-1-ene:** The orange-brown bromine water is decolourised (turns colourless). M1\n- **Observation with poly(hex-1-ene):** The bromine water remains orange-brown (no reaction or no colour change). A1\n- **Explanation:** Hex-1-ene is unsaturated (contains a $C=C$ double bond) which undergoes an addition reaction with bromine, whereas poly(hex-1-ene) is saturated (contains only $C-C$ single bonds in its main chain). B1","marks":3,"order":0,"markingRubric":null,"tableImages":[],"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null,"walkthroughVideo":null}],"subjectCode":"gcse_chemistry","summaries":[{"id":"017e49c7-5b5d-4334-9950-897c8492e767","difficultyBand":"easy","calculatorUse":null,"totalMarks":2},{"id":"0b398eb4-679e-47b1-ae96-69b13c26b167","difficultyBand":"easy","calculatorUse":null,"totalMarks":2},{"id":"1c39d77a-cb28-4473-ba04-9fc454732a49","difficultyBand":"easy","calculatorUse":null,"totalMarks":2},{"id":"1ebc2848-52ab-489e-aa74-183ce45f556f","difficultyBand":"medium","calculatorUse":null,"totalMarks":6},{"id":"2db0ae9e-ac89-4a68-8ad7-cd170d0fcb3e","difficultyBand":"medium","calculatorUse":null,"totalMarks":1},{"id":"32ec46d6-04d8-4c4e-b802-9706fdfd5f77","difficultyBand":"easy","calculatorUse":null,"totalMarks":2},{"id":"531902dc-5c13-4212-a4e3-a85f6a627ae7","difficultyBand":"easy","calculatorUse":null,"totalMarks":2},{"id":"53c02967-0e1a-4266-88b3-adee541cad94","difficultyBand":"easy","calculatorUse":null,"totalMarks":2},{"id":"545ca89f-e47c-490e-9de1-2931a1f8ff70","difficultyBand":"easy","calculatorUse":null,"totalMarks":2},{"id":"5a292060-a648-4a7a-9650-210a729329d6","difficultyBand":"easy","calculatorUse":null,"totalMarks":1},{"id":"608f8ab9-5578-475b-b3f5-5fc82847f936","difficultyBand":"easy","calculatorUse":null,"totalMarks":2},{"id":"621aae0e-316a-4e3d-b602-04f6a04fcc22","difficultyBand":"easy","calculatorUse":null,"totalMarks":2},{"id":"622921f7-10ec-476e-95be-11cfa339f7ad","difficultyBand":"easy","calculatorUse":null,"totalMarks":2},{"id":"6445a9fa-b024-4f74-a919-a45d0129f3c4","difficultyBand":"easy","calculatorUse":null,"totalMarks":2},{"id":"69e271da-5978-4a0d-bdc3-adba6a9f865d","difficultyBand":"medium","calculatorUse":null,"totalMarks":3},{"id":"6b258a5b-95a7-43f7-af75-81f731e36908","difficultyBand":"medium","calculatorUse":null,"totalMarks":3},{"id":"7b

Hydrocarbons

Question 4

Hydrocarbons Questions

Hydrocarbons

Question 4

Hydrocarbons Questions