PAG 7.2 – Identifying organic unknowns 2 – Primrose Kitten

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PAG 7.2 – Identifying organic unknowns 2

Last updated: 12/03/2020

OCR-A A-Level Chemistry Testing for organic functional groups PAG 7.2 – Identifying organic unknowns 2

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Question 1 of 40

1. Question
What type of pipette should be used?
- Dropping pipette
- Transfer pipette
- Volumetric pipette
- Graduated pipette
Correct

Incorrect
Question 2 of 40

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

Incorrect
Question 3 of 40

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

Incorrect
Question 4 of 40

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

Incorrect
Question 5 of 40

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

Incorrect
Question 6 of 40

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

Incorrect
Question 7 of 40

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

Incorrect
Question 8 of 40

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

Incorrect
Question 9 of 40

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

Incorrect
Question 10 of 40

10. Question
What is being identified during part 1?
- Alcohols
- Ketones
- Carboxylic acids
- Aldehydes
Correct

Incorrect
Question 11 of 40

11. Question
How much of each alcohol should be placed onto the spotting tiles during part 1?
- 2 drops
- 1 drop
- 3 drops
- 4 drops
Correct

Incorrect
Question 12 of 40

12. Question
How long should the colour change be observed during part 1?
- 5-10 minutes
- 15-20 minutes
- 2-3 minutes
- 1-2 minutes
Correct

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Question 13 of 40

13. Question
What is one hazard when using propanal within an experiment?
- It is highly flammable
- It is carcinogenic
- It is highly toxic
- It can be harmful when swallowed
Correct

Incorrect
Question 14 of 40

14. Question
What is one hazard when using propanal within an experiment?
- It can cause skin and eye damage
- It is carcinogenic
- It is highly toxic
- It can be harmful when swallowed
Correct

Incorrect
Question 15 of 40

15. Question
What is one hazard when using propanone within an experiment?
- It is highly flammable
- It is carcinogenic
- It is highly toxic
- It can be harmful when swallowed
Correct

Incorrect
Question 16 of 40

16. Question
What is one hazard when using propanone within an experiment?
- It can cause skin and eye damage
- It is carcinogenic
- It is highly toxic
- It can be harmful when swallowed
Correct

Incorrect
Question 17 of 40

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

Incorrect
Question 18 of 40

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

Incorrect
Question 19 of 40

19. Question
What concentration of aqueous potassium dichromate is used?
- 0.10 mol dm $^{-3}$
- 0.20 mol dm $^{-3}$
- 0.02 mol dm $^{-3}$
- 0.01 mol dm $^{-3}$
Correct

Incorrect
Question 20 of 40

20. Question
What concentration of aqueous silver nitrate is used?
- 0.05 mol dm $^{-3}$
- 0.10 mol dm $^{-3}$
- 0.20 mol dm $^{-3}$
- 0.40 mol dm $^{-3}$
Correct

Incorrect
Question 21 of 40

21. Question
What concentration of aqueous sodium hydroxide is used?
- 0.40 mol dm $^{-3}$
- 0.05 mol dm $^{-3}$
- 0.01 mol dm $^{-3}$
- 1.00 mol dm $^{-3}$
Correct

Incorrect
Question 22 of 40

22. Question
What concentration of aqueous ammonia is used?
- 1.00 mol dm $^{-3}$
- 0.05 mol dm $^{-3}$
- 0.01 mol dm $^{-3}$
- 0.40 mol dm $^{-3}$
Correct

Incorrect
Question 23 of 40

23. Question
What is being identified during part 1?
- Aldehydes
- Alcohols
- Ketones
- Carboxylic acids
Correct

Incorrect
Question 24 of 40

24. Question
How much aqueous silver nitrate should be used during part 2?
- 2 cm $^3$
- 3 cm $^3$
- 4 cm $^3$
- 3 cm $^3$
Correct

Incorrect
Question 25 of 40

25. Question
How much sodium hydroxide solution should be used during part 2?
- 2 drops
- 1 drop
- 3 drops
- 4 drops
Correct

Incorrect
Question 26 of 40

26. Question
Which of the following is a chemical used within tollens reagent?
- Silver nitrate
- Distilled water
- Benzene
- Hydrochloric acid
Correct

Incorrect
Question 27 of 40

27. Question
Which of the following is a chemical used within tollens reagent?
- Sodium hydroxide
- Phosphoric acid
- Ethanol
- Potassium dichromate
Correct

Incorrect
Question 28 of 40

28. Question
Which of the following is a chemical used within Tollens’ reagent?
- Ammonia
- Sodium chloride
- Propanal
- Hexene
Correct

Incorrect
Question 29 of 40

29. Question
How much of the aldehyde should be tested on during part 2?
- 0.5 cm $^3$
- 2.0 cm $^3$
- 1.5 cm $^3$
- 1.0 cm $^3$
Correct

Incorrect
Question 30 of 40

30. Question
When carrying out Tollens’ reagent, where should the test tubes be held?
- Warm bath
- Fume cupboard
- Ice bath
- Distilled water
Correct

Incorrect
Question 31 of 40

31. Question
What is one hazard when using sodium carbonate within an experiment?
- It can cause skin and eye damage
- It is highly toxic
- It is highly flammable
- It is carcinogenic
Correct

Incorrect
Question 32 of 40

32. Question
What concentration of aqueous ethanoic acid is used?
- 0.10 mol dm $^{-3}$
- 0.05 mol dm $^{-3}$
- 0.01 mol dm $^{-3}$
- 1.00 mol dm $^{-3}$
Correct

Incorrect
Question 33 of 40

33. Question
How much ethanoic acid should be used during part 3?
- 10 drops
- 7 drops
- 5 drops
- 12 drops
Correct

Incorrect
Question 34 of 40

34. Question
What colour change was seen for the test on propan-2-ol during part 1?
- Orange to green
- Blue to yellow
- Green to orange
- No colour change
Correct

Incorrect
Question 35 of 40

35. Question
What colour change was seen for the test on ethanol during part 1?
- Orange to green
- Blue to yellow
- Green to orange
- No colour change
Correct

Incorrect
Question 36 of 40

36. Question
What colour change was seen for the test on 2-methylpropan-2-ol during part 1?
- No colour change
- Blue to yellow
- Green to orange
- Orange to green
Correct

Incorrect
Question 37 of 40

37. Question
What observation is seen during part 2 when propanal is tested on?
- Silver mirror
- Effervescence
- Colour change from orange to green
- No observation
Correct

Incorrect
Question 38 of 40

38. Question
What observation is seen during part 2 when propanone is tested on?
- No observation
- Effervescence
- Colour change from orange to green
- Silver mirror
Correct

Incorrect
Question 39 of 40

39. Question
What observation is seen during part 3 when ethanoic acid is tested on?
- Effervescence
- No observation
- Colour change from orange to green
- Silver mirror
Correct

Incorrect
Question 40 of 40

40. Question
What observation is seen during part 3 when sodium carbonate is tested on?
- No observation
- Effervescence
- Colour change from orange to green
- Silver mirror
Correct

Incorrect

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