Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Physical properties
19 practice questions
Practice questions
1–3 of 3 · Hard
Question 1
2 marks · Hard
Answer and see the solution →A student claims that all alkenes have the same general formula. State this general formula and explain how it shows that alkenes are unsaturated.
Question 2
5 marks · Hard
Answer and see the solution →The physical properties of alkenes with 2 to 4 carbon atoms show a trend.
(a)[2 marks]State the physical state of ethene, propene and butene at room temperature.
(b)[2 marks]Describe how the boiling points of these alkenes change as the number of carbon atoms increases from ethene to butene.
(c)[1 mark]Explain why the trend you described in part (b) occurs.
Question 3
2 marks · Hard
Answer and see the solution →State the general formula for alkenes. Explain, using your formula, how you can determine the number of hydrogen atoms in an alkene containing 9 carbon atoms.