Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Chapter
Crude Oil
106 practice questions
Topics covered
Practice questions
51–60 of 106
Question 51
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 52
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 53
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 54
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 55
2 marks · Hard
Answer and see the solution →State the trend in boiling point and position within the fractionating column for hydrocarbons with increasing chain length, giving a reason for each.
Question 56
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 57
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 58
1 mark · Easy
Answer and see the solution →State one typical use of refinery gases.
Question 59
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 60
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.