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CHEMISTRY DEPARTMENT WAID ACADEMY

CHEMISTRY DEPARTMENT WAID ACADEMY. CARBOXYLIC ACIDS AND ESTERS. 20. The shortened structural formula for 2,3-dimethylpentanoic acid is. A B C D. 20. Which of the reactions shown can be used to make 3-methylbutanoic acid?. Catalytic hydration of 3-methylbut-1-ene.

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CHEMISTRY DEPARTMENT WAID ACADEMY

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  1. CHEMISTRY DEPARTMENT WAID ACADEMY CARBOXYLIC ACIDS AND ESTERS

  2. 20 The shortened structural formula for 2,3-dimethylpentanoic acid is. • A • B • C • D

  3. 20 Which of the reactions shown can be used to make 3-methylbutanoic acid? • Catalytic hydration of 3-methylbut-1-ene. • Oxidation of 3-methylbutan-2-ol. • Dehydration of 3-methylbutan-1-ol. • Oxidation of 3-methylbutanal.

  4. 25 Butanoic acid can be made by • Warming a mixture of butan-2-ol and acidified potassium dichromate. • Passing butan-1-ol vapour over hot aluminium oxide. • Warming a mixture of butanal and Fehling's solution. • Reacting but-1-ene with steam over a zinc oxide catalyst.

  5. 20 Which of the compounds shown will neutralise sodium hydroxide? • A • B • C • D

  6. 20 Which structure shown represents the ester formed when propan-2-ol reacts with methanoic acid? • A • B • C • D

  7. 20 Which two compounds are formed when the ester shown below is hydrolysed? • Propan-1-ol and ethanoic acid. • Ethanol and butanoic acid. • Butan-1-ol and ethanoic acid. • Ethanol and propanoic acid.

  8. 20 Name the ester formed when the acid and alcohol shown below react together. • Pentyl ethanoate. • Ethyl propanoate. • Propyl ethanoate. • Ethyl butanoate.

  9. 20 The shortened structural formula for methylbutanoate is. • A • B • C • D

  10. 20 Name the type of reaction which occurs when an ester is formed. • Dehydration. • Dehydrogenation. • Oxidation. • Condensation.

  11. 30 Esters can be prepared in the laboratory by heating an alcohol and a carboxylic acid with a few drops of sulphuric acid in a water bath. After 5 minutes the reaction mixture is poured into a beaker containing sodium hydrogen carbonate solution.Which two observations show that an ester has been formed? • Bubbles of gas are given off and the product smells differently to the reactants. • An oily layer forms on the surface of the solution and the product smells differently to the reactants. • An oily layer forms on the surface of the solution and bubbles of gas are given off. • An oily layer forms on the surface of the solution and the product is coloured.

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