Carbonyl compounds

Last updated: 15/02/2020
AQA A-Level Chemistry Carboxylic acids and derivatives Carbonyl compounds
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  1. Current
  2. Review
  3. Answered

  1. What symbol is used to show reduction?

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  2. How can you distinguish between an aldehyde and a ketone?

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  3. What is Tollens’ reagent?

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  4. What type of chemical is Tollens’ reagent?

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  5. What is the first step of the preparation of Tollens’ reagent?

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  6. What observation will be seen when Tollens’ reagent is added to an aldehyde?

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  7. What observation will be seen when Tollens’ reagent is added to a ketone?

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  8. What type of reaction occurs when Tollens’ reagent is added to an aldehyde?

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  9. What functional group is formed when an aldehyde is oxidised from Tollens’ reagent?

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  10. What type of reaction is the reaction between sodium tetrahydridoborate(III) and a carbonyl compound?

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  11. How is 2,4-dinitrophenylhydrazine shortened?

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  12. What is Brady’s reagent?

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  13. What functional group is Brady’s reagent used to test for?

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  14. What functional group is Brady’s reagent used to test for?

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  15. Using Brady’s reagent, how can an aldehyde or ketone be identified?

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  16. What observation is seen when Brady’s reagent is added to an aldehyde?

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  17. What observation is seen when Brady’s reagent is added to a ketone?

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  18. What observation is seen when Brady’s reagent is added to a carboxylic acid?

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  19. What observation is seen when Brady’s reagent is added to an ester?

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  20. How can the 2,4-dinitrophenylhydrazone derivative precipitate be collected?

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  21. State one disadvantage when testing with Brady’s reagent.

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  22. What is the definition of a nucleophilic addition reaction?

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  23. What functional group is needed for a nucleophilic addition reaction to take place?

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  25. What is the formula of sodium tetrahydridoborate(III)?

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