PAG 7.3 – Identifying organic unknowns 3 – Primrose Kitten

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PAG 7.3 – Identifying organic unknowns 3

Last updated: 12/03/2020

OCR-A A-Level Chemistry Testing for organic functional groups PAG 7.3 – Identifying organic unknowns 3

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Question 1 of 48

1. Question
How many parts are there to this experiment?
- 3
- 2
- 1
- 4
Correct

Incorrect
Question 2 of 48

2. Question
What is one hazard when using aqueous sodium hydroxide within an experiment?
- It can cause skin and eye irritation
- It is carcinogenic
- It is highly flammable
- It is highly toxic
Correct

Incorrect
Question 3 of 48

3. Question
What is one hazard when using aqueous ammonia within an experiment?
- It can cause skin and eye irritation
- It is carcinogenic
- It is highly flammable
- It is highly toxic
Correct

Incorrect
Question 4 of 48

4. Question
What is one hazard when using aqueous iron(III) chloride within an experiment?
- It can cause eye irritation
- It is carcinogenic
- It is highly flammable
- It is highly toxic
Correct

Incorrect
Question 5 of 48

5. Question
What is one hazard when using aqueous potassium dichromate within an experiment?
- It is highly carcinogenic
- It can be harmful if swallowed
- It is highly flammable
- It is highly toxic
Correct

Incorrect
Question 6 of 48

6. Question
What is one hazard when using aqueous potassium dichromate within an experiment?
- It can cause skin and eye irritation
- It can be harmful if swallowed
- It is highly flammable
- It is highly toxic
Correct

Incorrect
Question 7 of 48

7. Question
What concentration of ammonia should be used?
- 1.0 mol dm $^{-3}$
- 4.0 mol dm $^{-3}$
- 3.0 mol dm $^{-3}$
- 1.5 mol dm $^{-3}$
Correct

Incorrect
Question 8 of 48

8. Question
What concentration of ammonia should be used?
- 2.0 mol dm $^{-3}$
- 4.0 mol dm $^{-3}$
- 3.0 mol dm $^{-3}$
- 1.5 mol dm $^{-3}$
Correct

Incorrect
Question 9 of 48

9. Question
What concentration of sodium carbonate should be used?
- 0.500 mol dm $^{-3}$
- 0.250 mol dm $^{-3}$
- 0.050 mol dm $^{-3}$
- 0.025 mol dm $^{-3}$
Correct

Incorrect
Question 10 of 48

10. Question
What concentration of sodium hydroxide should be used?
- 0.4 mol dm $^{-3}$
- 0.1 mol dm $^{-3}$
- 0.2 mol dm $^{-3}$
- 0.3 mol dm $^{-3}$
Correct

Incorrect
Question 11 of 48

11. Question
What concentration of silver nitrate should be used?
- 0.050 mol dm $^{-3}$
- 0.250 mol dm $^{-3}$
- 0.500 mol dm $^{-3}$
- 0.025 mol dm $^{-3}$
Correct

Incorrect
Question 12 of 48

12. Question
What concentration of iron(III) chloride should be used?
- 0.1 mol dm $^{-3}$
- 0.4 mol dm $^{-3}$
- 0.2 mol dm $^{-3}$
- 0.3 mol dm $^{-3}$
Correct

Incorrect
Question 13 of 48

13. Question
What concentration of potassium dichromate should be used?
- 0.1 mol dm $^{-3}$
- 0.4 mol dm $^{-3}$
- 0.2 mol dm $^{-3}$
- 0.3 mol dm $^{-3}$
Correct

Incorrect
Question 14 of 48

14. Question
What concentration of bromine water should be used?
- 0.06 mol dm $^{-3}$
- 0.08 mol dm $^{-3}$
- 0.04 mol dm $^{-3}$
- 0.02 mol dm $^{-3}$
Correct

Incorrect
Question 15 of 48

15. Question
Which of the following types of functional groups does compound A contain?
- Aldehyde
- Alkene
- Carboxylic acid
- Tertiary alcohol
Correct

Incorrect
Question 16 of 48

16. Question
Which of the following types of functional groups does compound A contain?
- Primary alcohol
- Alkene
- Phenol
- Tertiary alcohol
Correct

Incorrect
Question 17 of 48

17. Question
Which of the following types of functional groups does compound A contain?
- Secondary alcohol
- Alkene
- Carboxylic acid
- Tertiary alcohol
Correct

Incorrect
Question 18 of 48

18. Question
Which of the following types of functional groups does compound B contain?
- Carboxylic acid
- Alkene
- Phenol
- Primary alcohol
Correct

Incorrect
Question 19 of 48

19. Question
Which of the following types of functional groups does compound B contain?
- Tertiary alcohol
- Aldehyde
- Phenol
- Secondary alcohol
Correct

Incorrect
Question 20 of 48

20. Question
Which of the following types of functional groups does compound C contain?
- Carboxylic acid
- Aldehyde
- Phenol
- Tertiary alcohol
Correct

Incorrect
Question 21 of 48

21. Question
Which of the following types of functional groups does compound C contain?
- Primary alcohol
- Alkene
- Phenol
- Tertiary alcohol
Correct

Incorrect
Question 22 of 48

22. Question
Which of the following types of functional groups does compound C contain?
- Secondary alcohol
- Aldehyde
- Phenol
- Alkene
Correct

Incorrect
Question 23 of 48

23. Question
Which of the following types of functional groups does compound D contain?
- Carboxylic acid
- Aldehyde
- Alkene
- Tertiary alcohol
Correct

Incorrect
Question 24 of 48

24. Question
Which of the following types of functional groups does compound D contain?
- Phenol
- Aldehyde
- Alkene
- Secondary alcohol
Correct

Incorrect
Question 25 of 48

25. Question
Which of the following types of functional groups does compound E contain?
- Primary alcohol
- Alkene
- Phenol
- Tertiary alcohol
Correct

Incorrect
Question 26 of 48

26. Question
Which of the following types of functional groups does compound E contain?
- Secondary alcohol
- Aldehyde
- Alkene
- Tertiary alcohol
Correct

Incorrect
Question 27 of 48

27. Question
What is one hazard when using propan-2-ol within an experiment?
- It is highly flammable
- It is highly toxic
- It is carcinogenic
- It can be harmful when swallowed
Correct

Incorrect
Question 28 of 48

28. Question
What is one hazard when using propan-2-ol within an experiment?
- It can cause eye irritation
- It is highly toxic
- It is carcinogenic
- It can be harmful when swallowed
Correct

Incorrect
Question 29 of 48

29. Question
What is one hazard when using a mixture of ethanol, water and concentrated ammonia within an experiment?
- It is highly flammable
- It is highly toxic
- It is carcinogenic
- It can cause eye and skin irritation
Correct

Incorrect
Question 30 of 48

30. Question
What type of pipette should be used during part 2?
- Dropping pipette
- Transfer pipette
- Volumetric pipette
- Graduated pipette
Correct

Incorrect
Question 31 of 48

31. Question
What type of beaker should be used during part 2?
- 100 cm $^3$
- 50 cm $^3$
- 250 cm $^3$
- 150 cm $^3$
Correct

Incorrect
Question 32 of 48

32. Question
What process does part 2 contain?
- Chromatography
- Measuring melting point
- Reflux
- Heating under reduced pressure
Correct

Incorrect
Question 33 of 48

33. Question
What should be calculated from the chromatogram in part 2?
- Rf values
- Average speed of spots
- The time taken
- Amount of solute used
Correct

Incorrect
Question 34 of 48

34. Question
What observation can be seen when compound A is added to Tollens’ reagent?
- Silver mirror
- Colour change from orange to green
- Purple solution
- Effervescence
Correct

Incorrect
Question 35 of 48

35. Question
What observation can be seen when compound A is added to acidified potassium dichromate?
- Colour change from orange to green
- Silver mirror
- Purple solution
- Effervescence
Correct

Incorrect
Question 36 of 48

36. Question
What observation can be seen when compound B is added to sodium carbonate solution?
- Effervescence
- Brown solution
- No change
- Colour change from orange to green
Correct

Incorrect
Question 37 of 48

37. Question
What is the pH of compound B?
- Less than 7
- More than 7
- No pH
- Roughly 7
Correct

Incorrect
Question 38 of 48

38. Question
What is the pH of compound C?
- Less than 7
- More than 7
- No pH
- Roughly 7
Correct

Incorrect
Question 39 of 48

39. Question
What is the pH of compound D?
- Less than 7
- More than 7
- No pH
- Roughly 7
Correct

Incorrect
Question 40 of 48

40. Question
What observation can be seen when compound C is added to sodium carbonate solution?
- Effervescence
- Colour change from orange to green
- Brown solution
- No change
Correct

Incorrect
Question 41 of 48

41. Question
What observation can be seen when compound C is added to acidified potassium dichromate?
- Colour change from orange to green
- Effervescence
- Colour change from green to orange
- Silver mirror
Correct

Incorrect
Question 42 of 48

42. Question
What observation can be seen when compound D is added to sodium carbonate solution?
- Effervescence
- Brown solution
- Colour change from green to orange
- No change
Correct

Incorrect
Question 43 of 48

43. Question
What observation can be seen when compound D is added to iron(III) chloride?
- Colour change from pale yellow to green
- Effervescence
- Colour change from green to orange
- No change
Correct

Incorrect
Question 44 of 48

44. Question
What observation can be seen when compound E is added to acidified potassium dichromate?
- Colour change from orange to green
- Effervescence
- Purple solution
- Silver mirror
Correct

Incorrect
Question 45 of 48

45. Question
What observation can be seen when compound F is added to bromine water?
- Decolourisation
- Effervescence
- Colour change from orange to green
- Silver mirror
Correct

Incorrect
Question 46 of 48

46. Question
What is the Rf value of leucine?
- 0.64
- 0.14
- 0.12
- 0.24
Correct

Incorrect
Question 47 of 48

47. Question
What is the Rf value of lysine?
- 0.12
- 0.24
- 0.14
- 0.64
Correct

Incorrect
Question 48 of 48

48. Question
What is the Rf value of aspartic acid?
- 0.24
- 0.12
- 0.64
- 0.14
Correct

Incorrect

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