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OCR A Level Chemistry A (H432) Chemistry B (H433)

  • Examen

    OCR A Level Chemistry A (H432) Chemistry B (H433)

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    18
    febrero 2024
    2023/2024
    A+
  • OCR A Level Chemistry A (H432) Chemistry B (H433)Ethanol is oxidised to ethanoic acid using acidified potassium dichromate(IV) solution. The reaction is heated under reflux using the equipment shown in the diagram below. What is the reason for heating under reflux? A. to ensure even heating B. to prevent any substances escaping C. to boil the mixture at a higher temperature D. to allow efficient mixing Your answer [1] 2. A chemist compares the rates of hydrolysis of 1-chloropropane and ...
  • consultant001
    $13.49 Más información
OCR A Level Chemistry A (H432) Chemistry B (H433)

  • Examen

    OCR A Level Chemistry A (H432) Chemistry B (H433)

  • -
    -
    -
    18
    febrero 2024
    2023/2024
    A+
  • OCR A Level Chemistry A (H432) Chemistry B (H433)Ethanol is oxidised to ethanoic acid using acidified potassium dichromate(IV) solution. The reaction is heated under reflux using the equipment shown in the diagram below. What is the reason for heating under reflux? A. to ensure even heating B. to prevent any substances escaping C. to boil the mixture at a higher temperature D. to allow efficient mixing Your answer [1] 2. A chemist compares the rates of hydrolysis of 1-chloropropane and ...
  • classrep
    $13.49 Más información
OCR A Level Chemistry A (H432) Chemistry B (H433) PAG 2: Acid-base titration Exam Questions and Mark Scheme

  • Examen

    OCR A Level Chemistry A (H432) Chemistry B (H433) PAG 2: Acid-base titration Exam Questions and Mark Scheme

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    19
    febrero 2024
    2023/2024
    A+
  • OCR A Level Chemistry A (H432) Chemistry B (H433) PAG 2: Acid-base titration Exam Questions and Mark SchemeThe equation for the reaction of aqueous phosphoric(V) acid, H3PO4, with aqueous sodium hydroxide, NaOH(aq) is shown below. H3PO4(aq) + 3NaOH(aq) → Na3PO4(aq) + 3H2O(l) 25.0 cm3 of a 0.200 mol dm−3 H3PO4(aq) is titrated with 0.600 mol dm−3 NaOH(aq). Which statement is correct? A. The end point occurs when 25.00 cm3 of NaOH(aq) has been added. B. The end point occurs when 75.00 c...
  • consultant001
    $13.49 Más información
OCR A Level Chemistry A (H432) Chemistry B (H433) PAG 2: Acid-base titration Exam Questions and Mark Scheme

  • Examen

    OCR A Level Chemistry A (H432) Chemistry B (H433) PAG 2: Acid-base titration Exam Questions and Mark Scheme

  • -
    -
    -
    19
    febrero 2024
    2023/2024
    A+
  • OCR A Level Chemistry A (H432) Chemistry B (H433) PAG 2: Acid-base titration Exam Questions and Mark SchemeThe equation for the reaction of aqueous phosphoric(V) acid, H3PO4, with aqueous sodium hydroxide, NaOH(aq) is shown below. H3PO4(aq) + 3NaOH(aq) → Na3PO4(aq) + 3H2O(l) 25.0 cm3 of a 0.200 mol dm−3 H3PO4(aq) is titrated with 0.600 mol dm−3 NaOH(aq). Which statement is correct? A. The end point occurs when 25.00 cm3 of NaOH(aq) has been added. B. The end point occurs when 75.00 c...
  • classrep
    $13.49 Más información
OCR A Level Chemistry A (H432) Chemistry B (H433) PAG 6: Synthesis of an organic solid Practice Exam Questions and Mark Scheme

  • Examen

    OCR A Level Chemistry A (H432) Chemistry B (H433) PAG 6: Synthesis of an organic solid Practice Exam Questions and Mark Scheme

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    26
    mayo 2023
    2022/2023
    A+
  • This resource includes exam questions from both Chemistry A and Chemistry B. It is not designed as a topic test but is instead intended as a document to support the teaching and learning of Module 1 – Development of practical skills in chemistry. 1. A solid organic compound can be purified by recrystallisation. Which statement(s) about recrystallisation is/are true? 1 The organic compound is more soluble in hot solvent. 2 The hot solution is cooled before the purified organic compo...
  • QUICKNURSE
    $16.99 Más información
OCR A Level Chemistry A (H432) Chemistry B (H433) PAG 6: Synthesis of an organic solid Practice Exam Questions and Mark Scheme

  • Examen

    OCR A Level Chemistry A (H432) Chemistry B (H433) PAG 6: Synthesis of an organic solid Practice Exam Questions and Mark Scheme

  • -
    -
    -
    26
    febrero 2023
    2022/2023
    A+
  • This resource includes exam questions from both Chemistry A and Chemistry B. It is not designed as a topic test but is instead intended as a document to support the teaching and learning of Module 1 – Development of practical skills in chemistry. 1. A solid organic compound can be purified by recrystallisation. Which statement(s) about recrystallisation is/are true? 1 The organic compound is more soluble in hot solvent. 2 The hot solution is cooled before the purified organic compo...
  • BESTPUBLISHER01
    $15.99 Más información
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