Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
101–110 of 335 · Normal
Question 101
1 mark · Normal
Answer and check →Which gas is a poisonous product of incomplete combustion of hydrocarbons?
- A.Carbon dioxide
- B.Nitrogen
- C.Carbon monoxide
- D.Oxygen
Question 102
2 marks · Normal
Answer and see the solution →Name two main fractions produced by the fractional distillation of crude oil and give one use for each.
Question 103
4 marks · Normal
Answer and see the solution →This question is about combustion of hydrocarbons and pollution.
(a)[1 mark]Name the two conditions necessary for the complete combustion of a hydrocarbon.
(b)[1 mark]Write the balanced word equation for the incomplete combustion of methane, producing carbon monoxide as one of the products.
(c)[2 marks]Explain why carbon monoxide is produced during incomplete combustion and state one environmental or health effect it can cause.
Question 104
3 marks · Normal
Answer and see the solution →A certain crude oil contains 1000 kg of hydrocarbons. When it is separated by fractional distillation at a refinery, the following fractions are collected:
Fraction Percentage by mass Refinery gas 4% Gasoline 20% Kerosene 15% Diesel oil 18% Fuel oil 23% Bitumen 20% Calculate the mass of the kerosene fraction obtained from this crude oil. Give your answer in kilograms.
(a)[3 marks]Show your working and give your final answer with the correct unit.
Question 105
2 marks · Normal
Answer and see the solution →State two typical uses of refinery gases.
Question 106
4 marks · Normal
Answer and see the solution →Gasoline (petrol) is an important fraction produced from crude oil.
(a)[1 mark]State what gasoline (petrol) mainly consists of.
(b)[2 marks]Give two different uses of gasoline.
(c)[1 mark]Explain why gasoline is suitable for its main use in vehicles.
Question 107
3 marks · Normal
Answer and see the solution →Most cars use gasoline (petrol) as a fuel.
Explain why gasoline, rather than refinery gases, is usually chosen as the preferred fuel for cars.
Question 108
3 marks · Normal
Answer and see the solution →A household gas tank contains 18 kg of liquefied petroleum gas (LPG), which is a typical use of refinery gases. LPG is mainly a mixture of propane () and butane ().
If the average molar mass of LPG is assumed to be , calculate how many moles of LPG the tank contains. State one typical domestic use of LPG in your answer.
Question 109
4 marks · Normal
Answer and see the solution →The table shows data about the use of refinery gases in different countries.
Country Percentage of refinery gases used for domestic heating (%) Percentage used for cooking (%) Country X 55 30 Country Y 70 20 Country Z 40 50 (a)[1 mark]Which country uses the greatest percentage of refinery gases for cooking?
(b)[1 mark]Calculate the combined total percentage of refinery gases used for domestic heating and cooking in Country Y.
(c)[2 marks]Suggest one reason why the percentages used for heating and cooking might differ between countries.
Question 110
2 marks · Normal
Answer and see the solution →Refinery gases are produced during the fractional distillation of crude oil. State two typical uses of refinery gases.