Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
611–620 of 785
Question 611
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 612
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 613
1 mark · Easy
Answer and see the solution →State one use of esters in everyday household products.
Question 614
2 marks · Easy
Answer and see the solution →Esters are used in both fruit-flavoured drinks and perfumes. Explain why esters are suitable for use in both these products.
Question 615
3 marks · Easy
Answer and see the solution →Table 1: Some esters and their typical uses. Ester Typical use Methyl butanoate Flavouring (apple) Ethyl ethanoate Solvent Propyl ethanoate Perfume Pentyl acetate Flavouring (banana) (a)[1 mark]Identify two esters from the table used as flavourings.
(b)[1 mark]Which ester from the table is used as a perfume?
(c)[1 mark]Give the fruit each flavouring (from part a) is associated with.
Question 616
1 mark · Easy
Answer and see the solution →State the main reason esters are chosen for making perfumes.
Question 617
3 marks · Easy
Answer and see the solution →(a)[1 mark]Name one ester used for a fruit flavouring in food.
(b)[1 mark]State what property of esters makes them useful as perfumes.
(c)[1 mark]Give one example of a product (other than food) where esters are used.
Question 618
3 marks · Easy
Answer and see the solution →(a)[1 mark]State one use of esters in the food industry.
(b)[1 mark]State one use of esters in the perfume industry.
(c)[1 mark]Give one property of esters that makes them suitable for these uses.
Question 619
2 marks · Easy
Answer and see the solution →A manufacturer wants to make a new strawberry-flavoured sweet. State which type of organic compound they should use to add the flavour and explain briefly why.
Question 620
2 marks · Easy
Answer and see the solution →A food company wants to make a new sweet product with a fruity taste and a pleasant smell. They plan to add 0.5 grams of an ester as a flavouring and 0.7 grams of an ester as a perfume in one batch.
State the total mass of ester (in grams) added to this batch and identify the two main uses of esters in this context.