Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
101–110 of 133 · Hard
Question 101
2 marks · Hard
Answer and see the solution →Name the ester formed from propanol and propanoic acid.
Question 102
5 marks · Hard
Answer and see the solution →A reaction mixture contains ethanol and benzoic acid. Heat is applied, together with a few drops of concentrated sulfuric acid as a catalyst.
(a)[1 mark]State the type of reaction taking place.
(b)[1 mark]Write the name of the ester that would be formed.
(c)[3 marks]Draw the full structural formula for the ester formed.
Question 103
2 marks · Hard
Answer and see the solution →Describe, using the names of the compounds, what is removed from ethanol and ethanoic acid during formation of ethyl ethanoate.
Question 104
2 marks · Hard
Answer and see the solution →State two reasons why esters are important in the manufacturing of everyday consumer products.
Question 105
5 marks · Hard
Answer and see the solution →A company is designing a new skincare lotion and a fruit-flavoured soft drink. They wish to add esters to both products.
(a)[1 mark]State a reason why esters are added to skincare lotions.
(b)[2 marks]Explain why esters are commonly chosen to flavour fruit-based soft drinks.
(c)[1 mark]Name one property of esters that makes them suitable for both products.
(d)[1 mark]Suggest another everyday product, not mentioned above, that commonly contains esters for a similar reason.
Question 106
2 marks · Hard
Answer and see the solution →Perfume and ice cream manufacturers both use esters. State the use of esters in each product.
Question 107
2 marks · Hard
Answer and see the solution →State the role of sulfuric acid in the laboratory preparation of an ester. Explain why only a few drops are added.
Question 108
5 marks · Hard
Answer and see the solution →A student is asked to prepare a sample of butyl propanoate, an ester, using only laboratory equipment and chemicals available at school.
(a)[1 mark]Write the names of the alcohol and the carboxylic acid required to make butyl propanoate.
(b)[3 marks]Describe, in order, the main steps the student should follow to prepare and purify butyl propanoate in the laboratory.
(c)[1 mark]State how the student can safely test for the smell of the product once separated.
Question 109
2 marks · Hard
Answer and see the solution →During the purification step in ester preparation, the mixture is poured into sodium carbonate solution. Explain the purpose of this step and describe what you would observe.
Question 110
7 marks · Hard
Answer and see the solution →Esters are formed from an alcohol and a carboxylic acid in an esterification reaction. Ethanol and butanoic acid react together under suitable conditions.
(a)[3 marks]Draw the full structural formula of the ester formed when ethanol reacts with butanoic acid.
(b)[1 mark]Name the ester formed in part (a).
(c)[1 mark]State one use of this ester in everyday life.
(d)[2 marks]Describe how esters like the one above are prepared in a laboratory. Include any catalyst and any condition needed.