Oxidation of alcohols

Last updated: 09/02/2020

Edexcel A-Level Chemistry Alcohols Oxidation of alcohols

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Question 1 of 20

1. Question
What is the definition of reflux?
- The constant boiling and condensing of a reaction mixture
- The heating of a reaction mixture
- The condensing of a reaction mixture
- The constant boiling, distillation and condensing of a reaction mixture
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Question 2 of 20

2. Question
Which of the following are used when oxidising an alcohol?
- Sulfuric acid
- Potassium dichromate
- Sodium hydroxide
- Nickel catalyst
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Question 3 of 20

3. Question
Which of the following is the oxidising agent used when oxidising alcohols?
- Potassium dichromate
- Sodium hydroxide
- sulfuric acid
- Nickel catalyst
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Question 4 of 20

4. Question
Write the balanced equation for the combustion of methanol.
- $CH_3OH + O_2 -> CO_2 + H_2O$
- $CH_3OH + 2O_2 -> 2CO_2 + 4H_2O$
- $CH_3OH + 3O_2 -> CO_2 + 2H_2O$
- $2CH_3OH + 3O_2 -> 2CO_2 + 4H_2O$
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Question 5 of 20

5. Question
Write the balanced equation for the combustion of butanol.
- $CH_9OH + 6O_2 -> 4CO_2 + 5H_2O$
- $CH_9OH + 2O_2 -> 4CO_2 + H_2O$
- $2CH_9OH + 3O_2 -> 4CO_2 + H_2O$
- $CH_9OH + 2O_2 -> 2CO_2 + 3H_2O$
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Question 6 of 20

6. Question
What is observed when a primary alcohol is oxidised?
- A colour change from orange to green
- A white precipitate is formed
- Colour remains orange
- A colour change from green to orange
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Question 7 of 20

7. Question
What is observed when a secondary alcohol is oxidised?
- A colour change from orange to green
- A white precipitate is formed
- Colour remains orange
- A colour change from green to orange
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Question 8 of 20

8. Question
What is observed when a tertiary alcohol is oxidised?
- No colour change
- A white precipitate is formed
- A colour change from orange to green
- A colour change from green to orange
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Question 9 of 20

9. Question
What products are produced when alcohols are completely combusted?
- Carbon dioxide and water
- Carbon monoxide and water
- Oxygen and water
- Oxygen and carbon dioxide
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Question 10 of 20

10. Question
What product is formed when a primary alcohol is oxidised under heating and distillation?
- Aldehyde
- Ketone
- Carboxylic acid
- Ester
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Question 11 of 20

11. Question
What product is formed when a primary alcohol is oxidised under heating and reflux?
- Carboxylic acid
- Aldehyde
- Ketone
- Ester
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Question 12 of 20

12. Question
What product is formed when a secondary alcohol is oxidised?
- Ketone
- Aldehyde
- Ester
- Carboxylic acid
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Question 13 of 20

13. Question
What product is formed when a tertiary alcohol is oxidised?
- No new product
- Carboxylic acid
- Aldehyde
- Ketone
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Question 14 of 20

14. Question
Write the equation for the oxidation of ethanol.
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Question 15 of 20

15. Question
Write the equation for the oxidation of ethanol to form a carboxylic acid.
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Question 16 of 20

16. Question
Write the equation for the oxidation of butan-2-ol.
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Question 17 of 20

17. Question
How can you test for a primary alcohol?
- Heat/distil the alcohol with acidified potassium dichromate and it is oxidised to form an aldehyde
- Heat/distil the alcohol with acidified potassium dichromate and it is oxidised to form a carboxylic acid
- Reflux the alcohol with acidified potassium dichromate and it is oxidised to form an aldehyde
- Reflux the alcohol with acidified potassium dichromate and it is oxidised to form a ketone
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Question 18 of 20

18. Question
How else can you test for a primary alcohol?
- Strong heating under reflux with acidified potassium dichromate to form a carboxylic acid
- Strong heating with acidified potassium dichromate to form a carboxylic acid
- Strong heating under reflux with acidified potassium dichromate to form an aldehyde
- Strong heating with acidified potassium dichromate to form an aldehyde
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Question 19 of 20

19. Question
How do you test for a secondary alcohol?
- Heat under reflux with acidified potassium dichromate and a ketone will form
- Heat under reflux with acidified potassium dichromate and a carboxylic acid will form
- Heat/distil the alcohol with acidified potassium dichromate and a carboxylic acid will form
- Heat/distil the alcohol with acidified potassium dichromate and a ketone will form
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Question 20 of 20

20. Question
How can you test for a tertiary alcohol?
- Heat under reflux with acidified potassium dichromate and no reaction takes place
- Heat under reflux with acidified potassium dichromate and a ketone will form
- Heat/distil the alcohol with acidified potassium dichromate and a carboxylic acid will form
- Heat/distil the alcohol with acidified potassium dichromate and a ketone will form
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