Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
241–250 of 785
Question 241
5 marks · Hard
Answer and see the solution →Pentane (C₅H₁₂) is a hydrocarbon fuel.
(a)[2 marks]Write a balanced chemical equation, using formulae, for the complete combustion of pentane.
(b)The supply of oxygen is reduced so that incomplete combustion occurs.
(i)[2 marks]Name two products, other than water, that could be formed during incomplete combustion of pentane.
(ii)[1 mark]Explain why less heat is released during incomplete combustion than during complete combustion.
Question 242
2 marks · Hard
Answer and see the solution →State two reasons why the fractions obtained from crude oil by fractional distillation are useful as fuels.
Question 243
1 mark · Easy
Answer and see the solution →State one typical use of refinery gases.
Question 244
3 marks · Easy
Answer and see the solution →(a)[1 mark]Name the main use of gasoline (petrol).
(b)[2 marks]State two different reasons why gasoline is suitable for this use.
Question 245
2 marks · Easy
Answer and see the solution →Explain why gasoline (petrol) is mainly used in cars, instead of being used as a domestic fuel for heating.
Question 246
3 marks · Easy
Answer and see the solution →The table shows the percentage use of refinery gases in different applications. Application Percentage (%) Domestic heating 60 Cooking 30 Other industrial uses 10 (a)[1 mark]Which application uses the greatest proportion of refinery gases?
(b)[1 mark]Calculate the total percentage of refinery gases used for domestic purposes (heating and cooking).
(c)[1 mark]State one industrial use of refinery gases, other than heating or cooking.
Question 247
1 mark · Easy
Answer and see the solution →State the main use of gasoline (petrol).
Question 248
2 marks · Easy
Answer and see the solution →A 12 kg gas cylinder is used for cooking in a household kitchen. The gas inside is refinery gas (LPG), which is a typical use of refinery gases.
Suppose each meal uses 0.5 kg of LPG. Calculate the maximum number of meals that can be cooked with a full 12 kg cylinder.
Question 249
3 marks · Easy
Answer and see the solution →(a)[2 marks]Name two typical uses of refinery gases.
(b)[1 mark]State the main chemical in refinery gases used for domestic heating.
Question 250
2 marks · Easy
Answer and see the solution →A car travels 40 km using gasoline (petrol) as fuel. If the car uses 8 litres of gasoline to cover this distance, calculate how many kilometres the car can travel per litre of gasoline. State your answer to 1 decimal place.