{
  "id": "30ffd00b-3cfd-5099-ab9e-4de6c5f49d82",
  "slug": "r3-3-electron-sharing-reactions",
  "title": "R3.3 Electron sharing reactions",
  "course": "IB Chemistry",
  "level": "SL",
  "syllabusCode": "R3.3",
  "questionCount": 15,
  "page": "https://splycr.com/ib-chemistry/r3-3-electron-sharing-reactions",
  "data": "https://splycr.com/library/r3-3-electron-sharing-reactions.json",
  "play": "https://splycr.com/?set=30ffd00b-3cfd-5099-ab9e-4de6c5f49d82",
  "section": {
    "name": "Reactivity 3: What are the mechanisms of chemical change?",
    "page": "https://splycr.com/ib-chemistry/mechanisms-of-chemical-change"
  },
  "source": {
    "name": "Biology by Bradford",
    "href": "https://www.biologybybradford.com",
    "note": "Written for the splycr library by Biology by Bradford."
  },
  "questions": [
    {
      "number": 1,
      "question": "Species with an unpaired electron?",
      "answer": "Radical",
      "wrongOptions": [
        "Cation",
        "Anion",
        "Nucleophile"
      ]
    },
    {
      "number": 2,
      "question": "Bond breaking in which each atom keeps one of the shared electrons?",
      "answer": "Homolytic fission",
      "wrongOptions": [
        "Ionisation",
        "Hydrolysis",
        "Neutralisation"
      ]
    },
    {
      "number": 3,
      "question": "Condition needed to split Cl₂ into chlorine atoms when it reacts with methane?",
      "answer": "UV light",
      "wrongOptions": [
        "Infrared radiation",
        "A catalyst",
        "High pressure"
      ]
    },
    {
      "number": 4,
      "question": "UV splits Cl–Cl rather than C–H because the Cl–Cl bond has a…?",
      "answer": "Lower bond enthalpy",
      "wrongOptions": [
        "Higher bond enthalpy",
        "Greater polarity",
        "Shorter length"
      ]
    },
    {
      "number": 5,
      "question": "Equation for the initiation step in the chlorination of methane?",
      "answer": "Cl₂ → 2Cl•",
      "wrongOptions": [
        "Cl₂ → Cl⁺ + Cl⁻",
        "CH₄ → CH₃• + H•",
        "Cl• + Cl• → Cl₂"
      ]
    },
    {
      "number": 6,
      "question": "Step in which a radical reacts and a new radical forms?",
      "answer": "Propagation",
      "wrongOptions": [
        "Initiation",
        "Termination",
        "Substitution"
      ]
    },
    {
      "number": 7,
      "question": "Step in which two radicals combine?",
      "answer": "Termination",
      "wrongOptions": [
        "Initiation",
        "Propagation",
        "Addition"
      ]
    },
    {
      "number": 8,
      "question": "Products of the propagation step CH₄ + Cl•?",
      "answer": "CH₃• + HCl",
      "wrongOptions": [
        "CH₃Cl + H•",
        "CH₃Cl + H₂",
        "CH₃⁺ + HCl"
      ]
    },
    {
      "number": 9,
      "question": "Products of the propagation step CH₃• + Cl₂?",
      "answer": "CH₃Cl + Cl•",
      "wrongOptions": [
        "CH₃Cl + Cl⁻",
        "CH₄ + Cl•",
        "CH₂Cl + HCl"
      ]
    },
    {
      "number": 10,
      "question": "Product when two methyl radicals combine?",
      "answer": "Ethane",
      "wrongOptions": [
        "Methane",
        "Ethene",
        "Propane"
      ]
    },
    {
      "number": 11,
      "question": "Type of reaction between methane and chlorine in UV light?",
      "answer": "Substitution",
      "wrongOptions": [
        "Addition",
        "Elimination",
        "Condensation"
      ]
    },
    {
      "number": 12,
      "question": "Dichloromethane forms alongside chloromethane because of…?",
      "answer": "Further substitution",
      "wrongOptions": [
        "Addition reactions",
        "Elimination reactions",
        "Hydrolysis"
      ]
    },
    {
      "number": 13,
      "question": "Alkanes are fairly unreactive because their C–C and C–H bonds are strong and of…?",
      "answer": "Low polarity",
      "wrongOptions": [
        "High polarity",
        "Ionic character",
        "Delocalised character"
      ]
    },
    {
      "number": 14,
      "question": "Symbol used to show the unpaired electron of a radical?",
      "answer": "A dot",
      "wrongOptions": [
        "A plus sign",
        "An asterisk",
        "A dash"
      ]
    },
    {
      "number": 15,
      "question": "Colour change when bromine reacts with hexane in UV light?",
      "answer": "Orange to colourless",
      "wrongOptions": [
        "Colourless to orange",
        "Orange to green",
        "Purple to colourless"
      ]
    }
  ]
}