Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
291–300 of 785
Question 291
7 marks · Hard
Answer and see the solution →Crude oil is an important natural resource formed over millions of years and separated into different fractions for various uses, including kerosene.
(a)[3 marks]Describe the process by which crude oil forms from ancient sea plants and animals over millions of years. Include two different physical factors essential to this process.
(b)[2 marks]State what kerosene is used for. Give two different uses.
(c)[2 marks]Explain why kerosene, as a fraction of crude oil, is useful for these applications, referring to its physical properties.
Question 292
1 mark · Easy
Answer and see the solution →State the type of reaction that takes place when methane reacts with chlorine in the presence of ultraviolet light.
Question 293
3 marks · Easy
Answer and see the solution →The following questions are about the alkanes.
(a)[1 mark]State the general formula of alkanes.
(b)[1 mark]What does the letter 'n' represent in the general formula ?
(c)[1 mark]Using the general formula, give the molecular formula for an alkane with 7 carbon atoms.
Question 294
2 marks · Easy
Answer and see the solution →Draw the displayed (structural) formula of an unbranched alkane with 3 carbon atoms. State the name of this alkane.
Question 295
2 marks · Easy
Answer and see the solution →Explain why the reaction between propane and chlorine in ultraviolet light is called a substitution reaction. Use a chemical equation to support your answer.
Question 296
1 mark · Easy
Answer and see the solution →State the general formula for alkanes.
Question 297
3 marks · Easy
Answer and see the solution →This question is about the unbranched alkane with seven carbon atoms.
(a)[1 mark]Write the name of this alkane.
(b)[1 mark]Give its molecular formula.
(c)[1 mark]Draw its displayed (structural) formula.
Question 298
2 marks · Easy
Answer and see the solution →Pentane () reacts with bromine in ultraviolet light.
(a)[1 mark]Write a balanced chemical equation for the mono-substitution reaction between pentane and bromine.
(b)[1 mark]Name the organic product formed.
Question 299
2 marks · Normal
Answer and see the solution →State the general formula of alkanes and explain what this formula represents.
Question 300
4 marks · Normal
Answer and see the solution →The alkane with six carbon atoms is called hexane.
(a)[1 mark]Write the molecular formula for hexane.
(b)[2 marks]Draw the displayed (structural) formula of hexane.
(c)[1 mark]Give the name of the alkane with three carbon atoms in a straight chain.