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A-LevelChemistryIntroduction to organic chemistry9701/21 · May/June 2019 · Q415 Marks

The structure of compound Y is shown. [Figure Y.Y]

  1. (a)Give the systematic name for Y.[1]
  2. (b)Predict the values for the bond angles a and b shown in the diagram. a ...................................... b ......................................[2]
  3. (c)(i)State the molecular formula of Z.[1]
  4. (c)(ii)Name the type of reaction occurring when Y is converted into Z.[1]
  5. (c)(iii)Alcohols can be classified as primary, secondary or tertiary. Identify with a tick (✔) the alcohol group(s) present in Z. alcohol group present in Z primary secondary tertiary[1]
  6. (d)(i)Identify all of the compound(s), A–D, that contain a carbonyl group.[1]
  7. (d)(ii)A-D are reacted separately with the reagents given in the table. Complete the table to: • identify which of the compounds, A–D, reacts with the reagents • give an appropriate observation when a reaction occurs. reagent | compounds identified | observation when a reaction occurs Tollens' reagent alkaline solution of iodine sodium metal[8]

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Mark scheme

Marking points from the official mark scheme (May/June 2019). The mark or mark type is shown in brackets.

  1. [1] 3-chloroprop-1-ene
  2. [1] a = 109(.5)°
  3. [1] b = 120°
  4. [1] C3H7C1O2
  5. [1] oxidation
  6. [1] (Tick in secondary row)
  7. [1] A and B
  8. [1] (For Tollens' reagent) Compound(s): B
  9. [1] (For Tollens' reagent) Observation: silver mirror OR grey / black / brown / silver precipitate
  10. [1] (For alkaline aq. iodine) Compound(s): A
  11. [1] (For alkaline aq. iodine) Compound(s): C
  12. [1] (For alkaline aq. iodine) Observation: (Pale) yellow precipitate / solid
  13. [1] (For sodium metal) Compound(s): C
  14. [1] (For sodium metal) Compound(s): D
  15. [1] (For sodium metal) Observation: Effervescence / sodium/solid disappears

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About this question

Topic
Introduction to organic chemistry, A-Level Chemistry (syllabus 9701). Structured question, 15 marks.
Source
A-Level Chemistry, May/June 2019 Paper 2 Variant 1, question 4.

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